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 0x65c34e8c6c0c174db8d87888ed45ef7d67ef1b87354c4e2b88224523027ecbcd. 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/521d0d6f-44bf-4b10-bddc-6949577c9c1c.json and https://artists.proofprofile.net/proofs/artist/521d0d6f-44bf-4b10-bddc-6949577c9c1c.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 0x6554da2cf2181c63ff1be24a5e3374536b0adf478ee4be755f2e32a699fc01f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX3Q92064567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc927611fc232ae943f4934a287499de9dd66d6f53b6796b05b8b760404a43784. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMA22342962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbb05f433d14ce5e761a553a7755742438cfaac9018e21f74cdfaf109ee58ac. 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/UKXN22393039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1a3752ff9a0c79e3cb7fab0271cfbfe36ca7c9c4845e99fa9772eb002f8b57. 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/UKXN22270012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777522c85b57ae662d82cd2d4b1eced1840775294d6c6c206d2972f0af4d1ac. 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/GX53U2034862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62046c588351c4f1b2be14645ae72bb7067f533c4e56e4fe6ceae4e0f33f2049. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3Q92164083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b963da59816af3cf1093d59501cb0b22babe9d39734735f45390f10bd83914a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMA22142895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9b944d94adc707b9eb3bc6ffd5df7725e0acef5aa67239219d87a92c9d22fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBMA22106831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe30fb669f9e9d4e0623ad76352a47cc69a87e68aef108dc2b11ecefb54723. 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/GBLFP2125870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1066be52156796aa9380b72d14922e9be00b6d338d8c9eaba4be4290d81cf2f9. 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/UKXN21911722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b22c8a01ea7167a790e845492b9155c09cf42e36cc8b750638ba58727a7924. 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/UKQPZ1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0048690f7469d30521ee22af371400ab550bf1bd63f494025847cbf8305d8b. 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/GBLFP2079831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8ffce6d8b156ab1711c0da141c85cead00c56643a1cfb787c51e36ce148a40. 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/GBMA22070538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f45ce6566f520452c5ce6a050b689164d8cce90042272cdd164aa0b933175b. 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/UKSHP2000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d70a3673ec0b9a90dd00ea0e3ddbb6d09037f037193c0471c80fa041ee5337. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP1981838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b60d109f0bf25002cd705e60ef7dc7697f629554d23c30a0052f01de4f945d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBMA21865738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633abee313e8a6dc02214da549524d38f5e59fb34c87927054bafe19e0cc0e5. 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/GBMA21808383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2497a90618e6516615d8fe89f54e458f2dd23a04ce0565013f44e0b863575. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP1891028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8981946ff1dcbebf35708067afc49b76b97921246a46037ca5c4a2bcc5644145. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP1829073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722b06e5cccd28b84ec0c0920b1a2d6bd799d6fdd96b0267082279145e1d8643. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLFP1781564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc263455d85cd3e644079b6e0f699040f3bde8fc84bbdf96b3fc17254fcdf6c41. 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/GBLFP1779673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df265674387b39a0526dfd40c1855a6a0f7ff63dcbb8869a941718b75d366d2. 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/USV291420945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca383cfe4478b8d2ab5a942d1f84145d4a4bbbb7f883bb9a57dfb9aeeaa5f876. 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/UKSHP2000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ab086dce4a5a58f4cde3560ce1bdec271e7a8cf9e84ccd060fb8f287f6c71d. 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/UKSHP2000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1298aad15224ecbc549ef9a0408117f96403e7098bb1626796e668c55e0090. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKSHP2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24bbd3f2437975f66a151f2281e76f0132b0f328125b0caf47bc4579a462d09. 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/UKRUD1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2159387c7d4ba5247fde811bf34e5b9a3fb37de5588cd002257bd3c76efa8d63. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKXN22592728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a870dbd459501a5b821b0ee941b6a405bbb94867b6e58a5817dbf3650d1995a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX53U2364764.