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 0x587e7a3dfd49c88f4f5e58bd50539fc643ccf03017aeaf304a875e1c591d76ba. 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/f988a463-5254-483a-b8c2-075c13e29d0a.json and https://artists.proofprofile.net/proofs/artist/f988a463-5254-483a-b8c2-075c13e29d0a.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 0x02fa1f3138ac25dd420b5a8fb80b2050b213cb45b35bda54010ee95fe352f507. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:33Z), 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/CA5KR2060612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0c9b917a1461acbc3712a3aae73da797444ea44144ef35ffc8665740f1c1a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2082297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c48f6022fffc4d512563040fb26f363f9bb60b6fc70a707dc097614cdbe770. 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/CA5KR2334284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb47c1ab889a22682e683fdf6f60584f2bc23bfa329e0d03d423d192e430f6d3. 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/CA5KR2338048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cacac3a391b46d708683d8c365cdbd4f6f00091449550346e479164425b213. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IT7LD2301299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cacac3a391b46d708683d8c365cdbd4f6f00091449550346e479164425b213. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IT7LD2301299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b3d23aca840cd4c3f7a10e57e84204da3f9fd44fe830be032a8126001381f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA5KR2380872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70e8b3cebe750b469ae34b5880b4fb4a3e70653032324871c9f205d4a71d1e1. 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/CA5KR2380873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda676647d9aadba474cebfbf021773666b3d1c32b7a1c0194a9471a72b31ade7. 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/CA5KR2380874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd5f5f6b2072a9dc8f885bde053aa581c4197817059c1ea821f0720e21a1099. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:25:40Z), 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/CA5KR2380875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7893833d741f02002d350b2e413251d02de3cecc20970f73964911e24feee3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:25Z), 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/CA5KR2380876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ffea66c1c3091c29f05296e9193dd87879063d067602798ef9dbcf608191eb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CA5KR2405352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89627b89a1fd6a00f8d1c07227c4d9870eef0be91e8dc0cc817c0eb339de9b9b. 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/US38Y2423250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d35c369253b5c292d28010513679e74be02a2f5d59ba6d4517ff30e4924823. 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/US38Y2501603.