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 0x791c04f00d9aaa3eea2081e54f2780ca3fd5266faac3f782a7013fa23a0a31bd. 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/beeb3c7c-c52c-4866-a255-3d930946ffa0.json and https://artists.proofprofile.net/proofs/artist/beeb3c7c-c52c-4866-a255-3d930946ffa0.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 0xbb0ffddc68c02c5861ee0b4ab53897aaf6f222d3aba38ffba96cc34d9398f48b. 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/BXIV82214164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55606ab2a2c11bb785838482485c12b2c805ce63c07c3d1a2ccd90057696634. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BXIV82220601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef94149b2b879976aa0983b32ed9c6fdce37294409a9f0d73d191e208d511d3c. 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/BXIV82278614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d00c084ae3943599183583636f4893218cab70aa5c2b5683a9ff07a31f9c41d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BXIV82256823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ef3551bd6b0d6387af32f6ac64e41aeb777f09098c64ecfb54392b85a9067. 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/QZNJX2358789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72d131d793a8a74bbc04323074c52b9b933c482edf44f80e272dab9dce96de. 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/BXIV82302191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b586663dd09f4e31ce9d3141404d5dfe3b5c34b995093cf6356f85ec136a7bd. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BXIV82340720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321deb026eed7c090feddb1eaa6d09456871b021bba8d35b69f48de2fb0e5786. 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/BXIV82373801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb57ebef4f4b74ecf208206544744d353a53d49f998044a3922f40827233805. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BXIV82490728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48cb96ad646076beab1f2d6896e6bf3d5f494e2cda58c852a35e476bf893883. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/BXIV82494704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd24c9f2373c392b81d10d3762e072679aa74a0c26ecac8a319fa83c842281a. 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/BXIV82415104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5a105e91c87d5355df44010ba36c95878ed813a9c323ef8ac31b638e16f7c9. 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/BXIV82444838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efd3b88b0fe3c74067d4c657be43e90996e70c6eabb8780fb800b1578210194. 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/BC6M22410357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee909e7a1b1662db4f7a5ea645e7fa0f517d4caabdcb920d7b38115f1501b96e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/BC6M22410356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b462199922583af4949c55dae716980156e5af6eb14d3b3ade095b54f4ce84. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BC6M22410355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edfad4430666c19a1d339e57410cd5cb234d99e31f53b008c6d7cfe97c1cd7f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BK7PA2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d2972fea20233953f49c488072673b4da3a321e0e3ca61c67a8aa7b92976a. 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/BK7PA2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ba9cd2079ef0528a299736eea8992f14f69592b4747192a48d3c42148d7e8. 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/BK7PA2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7a358ff1c987abf6d46d80fb9b39910021c8f8159057d1d04c1ade831ee5d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK7PA2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781ca48e1971c913053632a695c21b2ce59956558cd7d910dd9993387c441523. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BXG212500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa766d2b5076311fd7730a2e02e6e7a04966f1edb6c14ad6276e9cc9e6044db40. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/BK7PA2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2f833ff565d50b313fd08bd0f0abc25deafe2f56ec9dd484674e70a2e61955. 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/BK7PA2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a81bf927f1d7d23fa4468e624a29193b70e69d3c4e0c3f814880c9dd4c015f. 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/BK7PA2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ff04d87e40086f5c3722d69451e88c9d3e69719edbd6dda71378979030329. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BK7PA2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd8f6bd859a75da7378f74748201a0bc724d31248525309479a054a598d68f3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BK7PA2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee160bf0e2f9e5c8ad0bf573f007221bb285abc6d4721323df1dd99cd8689b8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BK7PA2500013.