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 0xf31261c283d6198eab41b3fcbe120b3206cc3321e5ebab6201819952d8ab6d37. 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/124fcdf7-d0cd-4a7b-bee3-96eaeddbb38d.json and https://artists.proofprofile.net/proofs/artist/124fcdf7-d0cd-4a7b-bee3-96eaeddbb38d.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 0x5f8b5ba4026f00607e4c9847704c8b30c8f98545ca8b49a4e71f89ce06a40e1c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEWLR0900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e010f6ec7eb3028fbb2134847666a975a1177fe0dd179bfa5f47653c28cf86. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SEWLR0900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f3319075aa43bd9043b05d50a2a1fae860f692b4b031854bd1fcfb592c01c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SEWLR0900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3c153b1e147b295c5e11d4aa4cdc8112f76f38c9e4c139084a08946170da5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/SEWLR0900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6647518dc3940c0c285b50adebc5f481c752fa82bbe8eeca0161807dca8eff. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SEWLR0900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cc67c9131fdcd083a50298b2f507926faf393957fafec094621a15e884b2f1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEWLR0900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80f3319075aa43bd9043b05d50a2a1fae860f692b4b031854bd1fcfb592c01c. 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/SEWLR0900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d867036a9ca8e60643390339a4b060e7688b5663fb8b40a3868cb282d08738. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEWLR0900302.
Eleven Shades of Black (Bonus Tracks Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5863b47ad46248ddad113faa71fbc116cacd95e8fa5ff154b9a2e5f1fb870c4b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/SEWLR1000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e06b9852d9ca998d3bc143bb489b981d91f2bae33bbb08c795fb7882e024680. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SEWLR1202503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9c2d3fadde488186b23a0b1f489ddb375e4226837d885a07b4350fd947cb5. 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/SEWLR1202504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a823802090509ef1da7eda1ba35943c7c8c5661697a5879fdb79a0d45dfd100. 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/SEWLR1202506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbcfba61ff39990237f5ff0a997aef85ede200597b5dabe28249c59f12dc895. 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/SEWLR1201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a427c3b9515fd5da93f6ab8993d585b09dfda3007ad64780603cca6f2fd7deb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEWLR1202502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf9c2d3fadde488186b23a0b1f489ddb375e4226837d885a07b4350fd947cb5. 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/SEWLR1202504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6ee12c9eee9163b3ba5c669774c5c037f08fd82da53556e4d7c65ba1c8b71f. 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/SEWLR1202507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da92b2c99a7e6953ee7170c66b0754def7ad05b9b310caa2648c7248a7cd44f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/SEWLR1202508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c6edbae3f0229f6b3e598fe87e88ac1f12ed11f785715f026091d1e0b6066. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEXTE1700701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e45bf6add383a452999cc685e628a3529dc068a91c46358e400e56b7c33c5c0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/SEXTE1700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd5a551ae8d84d1d193b844399db575f123a45195c89a99c1270b7cf9c0631. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SEXTE1700703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95ab1360835d4419e3f0d9d76f7eef33068849126ae23f795c5a1c2bcddc8a7. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/SEXTE1700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d215145efcbf667cd7b587fad6ccea03c6b111b97cdbc01d1ff0cdd945ddb1. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SEXTE1801204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78045741be8bd6f8655395c83761a71f9ad73baf5d3de9f264eeda66427e0853. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SEXTE1801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7b80556382052c04debe7f748a7398b698365ab2d327cdfcc72c1615b3e5d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEXTE1801208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d11f2ff02e3efff03041b2cea45bfd2641e1bf626f98c70202e4f7ed2ab01d. 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/SEXTE1801206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced11260bb6f67f75a0dee34269f3a24b962e1836d4f3c90b7d1efe6bc064a25. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SEXTE1801209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf857f082fc55521b0645c9f048e730b813ee07e3072317da03c0c4947b9cd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEXTE2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f4aaf69217c649a38efd231fbb66bcc4023b071f7a21b11eeed7319d441f7. 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/SEXTE2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd41f33ede0af83453a81c34fd5cc48fdf93e5167b9fac671f8dc0711c28df. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SEXTE2200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0830fd872a8d85a1531ab4159d9722930d832906b6ff75bfaba9d0fa3aa0a30. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/SEXTE2200903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd41f33ede0af83453a81c34fd5cc48fdf93e5167b9fac671f8dc0711c28df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEXTE2200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1e4dcc927c8e83d31b27dc3b045a1ee9620ae48a6e7db9476a50266ba947b. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/SEXTE2200902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4ad3371e73ab25cf172f17ade5b65cf5c3e0b3868bf9fc758ce1e9b1b45634. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEXTE2400201.