1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1893b878c378ba78bbcf335958c6b110c94d6f1fd09ace5388163a26f3d39fca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca429803-d4cb-4f16-a7ba-bdc181460706.json and https://artists.proofprofile.net/proofs/artist/ca429803-d4cb-4f16-a7ba-bdc181460706.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8266a4c6f29aa1b4f541b44105c3b24bebd1a54b14d2e3e3f38ce5f51d2c0311. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61633dccf73ea30c287e9854df2e1922a2b6e5819e97d6fbeee4616c57d941b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81719c3968559ae568237efdf4abf210c089badadae01a824d38b2e2cb8f18bd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7f63458e8a2ac27d78c24e25def43a8d29bde74538b0a5ee6822f4a16954f8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49f1b64d72c0fa77c9e9b71612f8e1e566c2385dd5e8c02af0c4d7a7beb9524. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe49abebeb6b967dd23fbb66ffe995fa746c5cebc66dfb6ae0d9f3b5bf70d75c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079a833fca0ae21478c491f6f608d08c1b13b26eaf22dc93806a90dae7de1e69. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce68e085bf5c0f40468afac37e43293f76160c1568bcb23f2b12a323e1febbc2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4274e4046210866dbbfd1787a0c44a335dafe57119c9be0da089284a5a3d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf21de90896463e8814f8c2506458da41bd1f9a39716835684ca2e98537366d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0853f9abdd99ad874b3b36f4f362b0df8bf2361af96622b09ab4c9be5084517. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e9eeafae922ac0be8ac47ea9699e2a535a0012d9b508fd880043801ff32f4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2341d744c776ddef48f13cf4e5aed41b7c5144d9717ed21160dbaa6c4635a390. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2002961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f59a8ec899bc90fb7558d9288dc5d5eb7b7023f6a04f2b47c40b8bf1da64b4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023229.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3c8299338e2a04be456f56d0b031248bc9fe777a8beeeb4b6981ef9e1373b2. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad256b80f17918942db873561f0537d1fb788dc6414041665eaa5356cbb559e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddccf6c4a68d99381d6fa1533416b8d04dab8f0cd136414d85ec497bd362ede. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce90f4b46f26430c6b245eb9aeb2d3c22f3f9bfbefed734f17d69e3dd754c05. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922aec89a85e7d4661a82a4bc0e95d64ed9f6bd9e4fa777f7d5ab035953c1ebd. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c1d5d43684953af53295f4a2754ddc9a69b76e863314d1e2b466f6dcabafbb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2023237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd741f4e04aa9e1fab01e4ecf5ea97043aa34004d650ace87416a2c577536eaeb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2302328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc889d30a57444c46f7dd6a0434452192bee1fafbd8aeb0e56825d372cf02e4a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793f862aa15826f105d1593cca1490f1badee74ae9f85192c7ea75d3529df7ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce7d66d7e10200e0d17f77d76293d00dc721d93078f9aea3f3a3a3e8826501d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8ff2214224ff9dae7b5039940f641abfc9c4d8bb63f545ba9a4259d72008fd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a3c245e23a31bbcf70b8dcc1e96c0f5134ff0307e5f180e0172f0b0d41c91. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055f0a8e7c7b01ddba81f49b5cb2c658c74674cb14b3e30509a8a1cfd044753d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3246089aed6304dbf84effd39b3e9be35906e7261426764f89e54e5df02f38d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608aa2554935c621bd49bf8592359cd5997e08ac229707caa46353e9c1720276. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6be6b72116fc4a722cf245852d7d4ce7b3e263616d19beb97ffc6408d00840. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d51965453809f8a9f3dbb8808ac336e55d177d504c478ce310c2f33e4bb3b6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEB2398700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee579ea894eb3b8ebb64704d5db7ab1b6884162df62e2b8d17e9e9718998dc1a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2302329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154c39c8ddbd060c35e49445a16e7f9ca7b798f2a50937bc62389c72411d353c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2302331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b677a291ff6d93246be89ca26a694b617c8eff6fc824c4427a27d0135b7e9b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2302327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260ed30cd16703ef739a4ff4a408f362f37f9f98f7302f8cec1e37c02d1fdaf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZEC2302333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0d8875d9b282676d2877e176f253d2921eee0521216aeef4c203a12e67e507. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ8A2371286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33add49ea06de0b69e541fbf74e924f33f0608be9489b4dbce2b4c9ce941a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX6Y62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e51d57ed3bbc80204edda8be6d8b1617eb1895d3cc3de355fa696f7ae2807b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BC9PK2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2368980c160b9f694bd298e6441c5abc349ac6304bf454ee74421571d25e82f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJX2094191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac6588bdfd53cd7c95125561601d30b2fef7d902f3a3aa7a18422805c53f79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDE2303666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd664ad8ca3502e45daf4c29644d4a1422d3dd2aa23c0714861c43eed3726b23b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTV32331332.