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 0x484b51d3ea335a1222bdaa5c618d423a3c6211ca14c4d12daebaad063911b76a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ad64b86-9f6e-44b7-9076-3a088953b4c8.json and https://artists.proofprofile.net/proofs/artist/6ad64b86-9f6e-44b7-9076-3a088953b4c8.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 0xc393821a55e0ebfe465f1a09d8a6fcd76f6290baebcdc50147fbd8744ad8e4de. 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/QMDA62222898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c1f2341b2afdf19c16487a816b6378ee083935d252ae763eefb31032b3115e. 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/QMDA62222903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0ae08df257f50828532168652b3c03f7d42a72f1c1df633580a07fb1f725e3. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMDA62222902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc723ae924c8008a18c0aae9dd6b49bdbc66be135e828a3b8762336e95522f1ad. 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/QMDA62222900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd05547d7ca94fdc533dce33a0a2cbade34a1c1dcfafb90a309e631a03bb9b3b. 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/QMDA62222904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8238433e3e6502a75bc7bf4e427dd4d7e8974adfb81273745a1baa32b5f2b80c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMDA62222905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5092a8f4b4d23982120ff1c5e38febb7cbdef62e4a717df341a94f4fdd3646b1. 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/QMDA62222899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89e1a9b715343e3321cc69ac24070bd75232adaff25099b58f504a481825a49. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA62222901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1420e6a2c27c57ac5d0eed9759357e7316e8a932e74319c089d813d9f63418bb. 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/QMDA62222906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95d1317811fde00158aae2f6147785654432eec707e7418b751ca4d7070b0f9. 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/DKK1N2400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eca695a69de2a6d2671a26cfb6b273561d78d99e1e8ac5d9f4a32c4a7265bd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZK6H2475840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1f459b8f0bd5cfd7497aed05bf952519e2e9a24bfd7abb56c3e56c750e467. 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/QMFMG2339435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b5339b1e58d1ea6891285e497e554621122c0948371efa1135ae16721eda72. 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/QM6P42397352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72670e5689e20d3836eb3420639b0d16923c3a9faeeecbb63655b0e06ad13a0e. 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/QMFMG2339437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d93f7dc6f221563c9381b2d37f33fb0c8103f36eb2cd992d65b36043fe630b8. 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/QMFME2366105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caf5155946cd827d295e3cd0c95a2443c83cc8790672a97e243f2fe5b919ab5. 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/QM6P42397353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f7cfbb0245a76e7b6fecf1463971ff5bae35b12bc317116152b491c19b1eb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFME2201739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6ce1a980e1e2bedae3f3ce8ad952a5b8fb0dc8ad65f9090d6cdbacb8ce9354. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMBZ92247726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c9a510f99f7fc0900840a47b7dacb99adead36d93b0c54dd81ad0a94169659. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMBZ92256501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c807d2085665a29a3e38a18d59bb2e460c2c10b34949fb11e01254987240e25. 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/QM6N22262044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9222f6067affae3f5ab152c3d3c2f7413bdf705ad12caf53c162dc66d3a0fc7. 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/QMFME2178415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1e06d886cc717848e277692c0b6d2944e36205fb761e4496295e58b3b61dd1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMFME2177420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8d90861cfcaa851d879da81937eef7120435463127a4e8f59d4e6daf23d572. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QMFME2177421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7827d9a40992fcbe92ee3938a14e838276aa334917834290c4d6434a5032e71. 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/QM6P42101131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ed4a233b144cb21c6584753e3259926eca2290063ef23db779a0c470148887. 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/QM6MZ2179697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26eca695a69de2a6d2671a26cfb6b273561d78d99e1e8ac5d9f4a32c4a7265bd. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZK6H2475840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604e9a15a50b5346602fd249a72e7b6757a3a9256f5fa3d5295a7f077aa96a8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZMER2420233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b37a1a088635e278493a5d037a0626c50be93e9776ef41fed66d812de8c723. 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/QZNWW2406499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11df74e37d4b64d0456d53cc1420442c5574b8596fafeda61dcb49b2010f0ef. 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/QZK6P2471524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7371a0fb2f8f0422c5c2e22cd1142701efe58f96dc8bcdbca0a90a4854f8959a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QM4TW2286541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661565ca564eb24bc0952f3b370d0a958392aaeb8c4f2c34991f4d2398aa747. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TW2239584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f285df9a44c6f02a45e4372175b03422a0f56f2cda72b60950af769beb79c8. 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/QMDA72132602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c566e8cbbf5de5a0d6edb875ae3c94e7189508b1a63692a1fe1c3e63939099. 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/QMDA72132643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603c37628509ebc39384b2aa5d27e6cfae3dbd681b717913cac9e904d8e3b828. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QM4TW2286519.