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 0xa6993947833384152d82f12b6ccb9091fc1dc59688a98f1807381a0e6f700a59. 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/2bbafc57-5def-40b0-9f4b-17dc5e65c7d0.json and https://artists.proofprofile.net/proofs/artist/2bbafc57-5def-40b0-9f4b-17dc5e65c7d0.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 0x09cac2512c83dcd592f273af1cf6a17f72a9373a8452ea02ea0079cce3ead02b. 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/QZ7D91738037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2669eb3c1df14a7d5b6efa5b116b6e318b66b022e07475b8ebf20f01dabd57. 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/QZAHP1717990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbd8956e166e9d2595dcfcbb352757915ebe4d809e4b8a80065c7ce32e4b886. 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/QZCSD1826999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6670568563c095c2fa2f1bd83f2ec00d27d1d53e1466ed262fe952e5d1a8874e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBMA21867424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f381e4c6a085da6037095f91d3ed716659ee7329cdfc46ed30140e75f2987d. 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/GBMA21867425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2120906c9612d29c469f0897b0b178a87ee7c1709cbc6beb3afd5dab5aad72. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMA21867426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aa9b83658fa7fc972fabc12b5008bf5d93a1d8cfad2b617a5faaeb7ed049e7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBMA21867427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa958cf86e7550ec238841639d72875d83bf98a25016cd6100cc223fde7285e4. 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/GBMA21867213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b17f1b205f4761a74c4f6dd6a704fea312e91f2af97fb2273df1dfcdab46d4c. 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/GBMA21867429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cce7b2750543ab0cc71371b23b8a8532629859aee1af91a56e77348a621ae1. 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/GBLFP1926952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc50f809c66bf3b1b3bdd79d94655645db90d83ad078fbd9db2451e1993dd1. 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/GBMA21867431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d233b9db233c8ebb7c9596c6ab42cc5f3f041841d8b2ef3c869385e54f74de. 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/GBMA22113522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa958cf86e7550ec238841639d72875d83bf98a25016cd6100cc223fde7285e4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBMA21867213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cce7b2750543ab0cc71371b23b8a8532629859aee1af91a56e77348a621ae1. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBLFP1926952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b36d95526e1a62df9ee5b8fac7afcee67eceb2fd6545188ad039ac24d9b35. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZAHP1888897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e5ff2ea24801fee734399065e727e7b4379492b0b0425a30c48b66ee17aa72. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZAHP1787829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cab4f8a8cdcb7927c50a71e7a0b7249a748155db14d0498222794e70e0cbbeb. 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/GBMA21880278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7225d04c8a4228d6f0b8ebb729842f5c091132f1e180d3619d91e43fb9957d. 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/GBMA21879131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657600dba58bc2f2886b4e27dbfb0a743e6f3ccfe2ee8486b6a0d948d9b5da67. 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/QZAHP1839457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24157bb20104145bb66d7dfdef507c2e102c3b78549805c09fd113d18060d06c. 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/QZCSD1833311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecb2b193700f92027e555de77b1f416dfcaa51e37a65464f2dee3c44282b15b. 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/QZCSD1831258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc03b259003240517166c3baca0f35d9d9b0e3d34c9dfeabcd8f6fe0ab5a40. 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/QZCSD1805503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e605c8be12a0d0a8145d4ae1971e9cb9efc068995639a9da77f65738d107b. 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/QZ7D91738028.