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 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 0xf8f9de4bab6b7b4b6f6f031c2a9d656814c236070cfc0057e50e20b7569fd169. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2737622-0bba-4c39-ae09-5fffc59879df.json and https://artists.proofprofile.net/proofs/artist/e2737622-0bba-4c39-ae09-5fffc59879df.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 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 0x9cfcdd1055f2c73c21fe750a566061cfaaf8040915aeb5d98a30fc7a724996a6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM91446146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54df17f040bd88ad0873be43c98c22661d74f9e3acf72de4c5f813be372e2aaf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USHM91446148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53432764e798d259a6a620e704447119f34ec265a6f9f9b877465aa40ea8230f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM91446150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e163c9e7ef26c637665243eebe8cb2a8cc77ffc428a13f07ff7cf035528a6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM91446152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3be400f8539467c2593ce746bce83d2092ab6c6c4ec6c3949dbfb85c2a926. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USHM91446153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218598b67f53e7e97ab54bffc80c509a412e24045d551954cde209a7092b6477. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USHM91434424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13c55dea9765cc1516741d687f2662fb43428803227427706ccd0678c5df6ef. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/USHM91434427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0326870dcce588b47b6b0067b2c489aa1478613bd912f91858b2c0098fb853ea. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM91434428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b38e0c807c40f1ff2842abc07b19f4f1bb2f788bd2f0e306106270901477a39. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM91434430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2a724e914d861b527a51b67842c4b6180b9a164fc328f2c723076c86248fd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81532840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a62a4de1ea4aec82183a11aba2c8d9804ca71af922badd0388ca0dce5a72e76. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM81532842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68a24a97a46fbebd97ee436bfba5025daddfdc40ce555111fa11753951b0714. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM81532844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69783a63daad6e1b39380a8bcdce139c87179c18dbe7c9290185826eb0fb08ab. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM81532845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ab400169277f5d7068e7f172f431dd963cb7a47ca2e30e5a4dd6686e631ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81532846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adb1a06ebfcaa6d56e664ce5fc21b07b5b03cecb724ab84a96fce70c63a04a6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81532847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9b5946fe75d762c343d1dae15bc64f3789efa797f17cf2db0a2af65ad640b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM81532848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cb4213f9df91476c9ef9d49e16d2cc3ac89b7212e67bf6d8dc79b26e681ac0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM81532849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bfe13cd0e08ed5e6a74fae1ce89b8f5e35b0a8f2b34b2973b473767179967b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41676150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adaf7f82df44f9dd3c56e2c2054fd96d4e7dd3c4f3a8748dd553316bfaab5d9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4Q1738363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c9afc739d7a7aaf350e8093a2e059c132c8054e238e8ca66e7972cf97a5679. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USL4Q1738365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c362cdbfb7f58a1bcc3b2e651aa7edeeec4e845407e9d05d0b9eb9a3d576f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q1738368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa705f34bbad3d7074b0bbaa1420e3be11737eb780f37d4cb4ca315ce199f80b8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1738371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51792efc2e5bac4d246930a57c324de5d5ed417aad5ca6a079c0acb0d63352d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USL4Q1738373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ecd7eb23204f4c90cb108f33588ccda8c8a2be8cac60e9a4ab9ee8f0382c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM21917398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9e943346aa05fbd34628b3dd85d01473ba9729f0807cb38835b3ae70eb1ce. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81976222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615fb6332072e4bcd895be6878e2211a587daed036539b64b6ef5f6b0ee2ea6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81976223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a381253a2c15c95f10fb383e1b52332afd55b178992e7f54f2010c94fc277af. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM81976224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee83055d370f034ca96d9d5d50fee534301d1449eacd7c124ed6b5e99d857a66. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY42077098.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc43d2d6ad3970e6d89a384c2b8afcfaf9d7e793e7dc1b3176d34397f3658c54. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USL4R2065809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f8d1fbd6e0bd9d2a50762344bd301f61b0b0d489a2ead8adcb08e086a2f725. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4R2065812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7465bcfa3779c57bab0d5b770eaa6b942ab85a455c45a63e16e8574cfa676f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USL4R2065813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e956b2b3babf4825ef0ce10ff28856ac316825531d27a4a1a3d5bab73a1d41. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4R2065815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f771db3ec14c8234e91b9927bc7c156750152351ea486132008cee702c4be1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4Q2196297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4f41d170045f35800013a4f1fe13201eb0124e2389358154fddb1162bf6564. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USL4Q2196302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e6bcbeb2a4f65c20a2e1a42f4fcdfa692ecd4eceb3653fddd8817b9fe26880. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2196303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb51e73f99cdac86b7ef7f46739930d15a02426d5815036f1c7221257dec8c7d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USL4Q2196304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab33fbc09c8a8575ee4b442966cdf26f94656d7f93b3ca30abf89d562c780c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USL4Q2196305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b2bd1242a0e8d845a30a2f4764c105f8498782e2dc5d878154b3eb8a85f66a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2196308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d27c48df20e734c942530138cdd36f7ef7056c7a522bc07eecc994d9ad5e0e4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM22431971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83777d54ac12d4e8cc48c489ebd7d7dee27813b2d1f92e58473a16a2287667c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM92572894.