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 0x39a81122c69947c1324c26ea0bac36f99de9fe92e1eec5ce9d7e4766341915f9. 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/e215cf37-441a-4ee3-a62d-22f26e1d998e.json and https://artists.proofprofile.net/proofs/artist/e215cf37-441a-4ee3-a62d-22f26e1d998e.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 0x72b341ce3ab580e6d97b4a3d2c1d3edb70f70142cab07006e5e2d8c1235512a9. 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/TCABU1457717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44d29aa885638997c86cdf9b1f2918247a1266fc47672621b7b897e50fb24e5. 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/TCABU1457719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5de139552ca64e721f272fe296b12aae1d4b019609850fea51114e06fab974c. 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/TCABU1457727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4e56e78158433fc9d96ce3caef43cc01edc8e733fd6c01bcb50912d0bdf8dc. 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/TCABU1457741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66e0af94bf59c23d8e8957d93b40ab5886b06214371259b7fbd7b5cf838c83a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCABU1457752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceef3b137a9556ca441897bb2ac8af46f879b606ed3ba307971366eff9d8bf8. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/TCABU1457755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8127e95b4407952042f843c265eada7470fa8fdcdf6c1b0f6863b2a7b80c271e. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/TCABU1457761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fb7202a201b589fb202cc873d939ace305733fe420013746f904a3de35b5f1. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCABU1457746.
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 0xf4607de2a17f2aedc591b5a17793f610b8fcaf83af6d4f4107598678e02cc33f. 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/TCABU1457715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2167aca2a58cf71f47c2604e6837c21bcbe459a2e4b660610294ba3c128032af. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCABU1457743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156415f084ce6f69e4c19bd3f13c036a6679bd003f7b3b8204578ca9f7369f1c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCABU1457751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0b9b69cd71819710e8f62dc337fa70adc31583fa57e15e69503b9525d92fbb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCABU1457756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f679abfdbd3f4604884d4c0960bb13aed6488643051fe6c886665343e22e8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US9WS1100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e0b8b0519b1ef1e596375f28f7bfecb36c5843bbb9c5a4c8bab3410ff4fc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US9WS1100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6945a3ff681b273e459d6e33612512ef8e148570e692901c95b16a6091f54c9. 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/US9WS1100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bab66a342de872120e4f382b5d259ed953fb4f81a66e546edc0ea31309d88d. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US9WS1100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530ad889a98446713adb74c8ad2e98816cfc636de9daa8660cc3541a7c91c4d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US9WS1100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b35faf5221d7d3ec1a4fb12de215aeed51fdaa6a74828d5a3356a81fd3c50a7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US9WS1100254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68dc6f35a619def7e3a06d470acba06aa48f5cf04461d4a55a68121ffe93d3a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US9WS1100257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c063a53497adc348c87d7aa2144550c4b11f4affcb6bd90c6e5d7a1cb59f164. 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/US9WS1100258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df3a5bd4ef8b456dd46c152931803df61188360f16fe8f69db2164d0cd03dd5. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US9WS1100259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea9dca8f4d21e31de87afa7705db7f8af91f4ffb5dfb5aeec8501dbd8c7a06c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US9WS1100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0268fdf2f6cf4f75f64843ca0a2476953fa862bec6d2af3be682687aa8ef7502. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US9WS1100261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39248d7b1ba79f62f924022f6d08a524b5978c654d66fe9f9c5e7533dd10a4c0. 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/US9WS1100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ac4f92b3583f05404a17ef52e6c6e33b11e4e0bbe7b1a62a10d05f4e0fab67. 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/QZNWY2142441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b0d3d41274470d525ac83bfbc65dc7278fcf4713f677c2232f69e9c2b295d. 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/QMKF62000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4110fcb613d426461da2d3713936971f2257a4ca387e02de2e603b24165ed43. 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/TCAEE1995843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd20eeb474aeb41be2366a151756788c275e91c5bf4449bbf2529381d7073a7. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/TCAEE1995849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f91486b73b23868be921d1fcfb18e2157b23fde39ba935440f7fa5463bf0c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAEE1995847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9790b488e901b7f38ea078229ca01d760c5677898bef7c98fb0e9e7caa81cc49. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAEE1995853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb049ae48ff16d9ebfad083f44275996cef3cc27b5204e275020dccb768e35768. 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/TCACL1656000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e61a4f85741155524478238f05bbe3cc7588953f2f824708cd0b35f4035f80d. 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/TCABK1231887.