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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95df002e1d8e29ebbd117ec2e98f61f4329941dad8964ca4bb17acdab7095c52. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/528a768e-de5b-4892-b0bb-d83e9ce6c903.json and https://artists.proofprofile.net/proofs/artist/528a768e-de5b-4892-b0bb-d83e9ce6c903.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf802c81300d1a4f802be113599ead35b41e80ad86fd6994352a042194a3fd45. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE5752160929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf970be8624001a9c9353f6a4e1a1a083ef309b0c4676d5f346715f1c07cf62d7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:53Z), 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/SE6I32136314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f8e38ca1884befbd68ff13fb083eb93a40f028c1a3a839575fb2f49fc88fa7. 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/SE6QE2150474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cd5686cf6f887f2b5bad676e34758d02def0150431863977b693f8bb1f62f3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:51Z), 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/SE6XW2121985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de00526165a44263c546a9160131854c3d5907f94ee8bc69458c0b336f79038. 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/SE6XY2187434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c73cd42c6af3c794f9fd1e54971e55a506115c0f8d624a9d0bc7de89fc0ec49. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6SA2226813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c73cd42c6af3c794f9fd1e54971e55a506115c0f8d624a9d0bc7de89fc0ec49. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:46:06Z), 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/SE6SA2226813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2edc2d836cdbadbc446186056e058cdffa6d993a0fa837795cd6c5155f699e. 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/SE62M2280984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6f2ea144ee8eac69a1592d6a1cbed729846f5a4ed9095b5aa66598cb22f1af. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE6I32384146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6f2ea144ee8eac69a1592d6a1cbed729846f5a4ed9095b5aa66598cb22f1af. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/SE6I32384146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f3fba0645a0ef58b6e0a6fbc6369d93623dcbad5871d168f9df94b15b61c8. 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/SE6XX2378737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f3fba0645a0ef58b6e0a6fbc6369d93623dcbad5871d168f9df94b15b61c8. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:45:44Z), 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/SE6XX2378737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed0be44582ba2134fe5908995c942dbc37c94971f877bb03a27ef68a1de3752. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:34:32Z), 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/SE6QE2469583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495d61f125cf4a2bc37633898f505af83f6f4232b59a9b9c14fab8368ec53832. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE6SA2447023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495d61f125cf4a2bc37633898f505af83f6f4232b59a9b9c14fab8368ec53832. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:26:43Z), 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/SE6SA2447023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc618c79d88737d9a98a997f0b5a3a328a1ad4074178ac4edde796b8dec8487b5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:36:45Z), 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/SE6XW2414953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b90d52aa73fc464a5a409691792a2cd0674070bf850a6eeb1f423f5ef7d62c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE5BU2522617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b57a61e044097efb0a93564e80bf238a99647727a23344c527a2bb1e527770. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTV32506833.