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 0x78c4b7316f9fbb6de6beaec9ad6b0ad77788c20179f6753577d2cc3a623aeb39. 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/4896e6b1-357b-486f-bdd0-9ef8add92ef3.json and https://artists.proofprofile.net/proofs/artist/4896e6b1-357b-486f-bdd0-9ef8add92ef3.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 0x93fbad2f4f6ad872fadd2e802017ff9fe0e8207800d0da8fc751b060ac50fbcd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BEP010490760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaac4248b5125f6c090849783ac450126d3e8c2178a838d9a9a2e0b9d0ff65f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/BEP010490761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61f1ea9554f265b13d8bee4f5a2f1fc53b0ed35a2e31ff6c1ba2d19ad076559. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/BEP010490762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532126776fddc440a187c1b70ec4916e4234b008fe9168948368edac91bcc42c. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BEP010490764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d693f026f3fa473fe267bf52045d02581cd7de7b556d5dd0565cce16836a346. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BEP010490768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b52093ec82e9c02ab105da9d187cf3442c8620cc95bfe845025975e4c080216. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USQY51728426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558a401aa340887e1a948c3690c62ac5a37203dad35514000a3c0c051e01623. 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/USA2P2503784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8073dd82902e27d5e38418c3798552ec14f1d55aebb799816eb602890581a0. 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/USA2P2503785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea8625eabdc6ba635c9025d667478c977e80c177d89acc03a2f67d7dd6599d. 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/USA2P2503786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe164fe04e0551c9377ccac608ace988132840fc69729f7795fb70f795ab26bc8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USA2P2503787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d85acd1f47bfd59d4772fc82c01de8883aed08353a62a6e8602226d1223de19. 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/USA2P2503788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3057a2780d1205f0c8272020acd8469f7d737330e6a827a4a40e349b8831b3. 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/USA2P2503789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c0533de86301d67917ee6d12ff06592699611d0bc219b25dc8e8009d98c15c. 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/USA2P2503790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba46b0b24b4ccfe587f997f2afc40a947d189ee00fe13f953720ff754d4e2c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA2P2503791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b7c13e3d9baf38e27e8c1b701e2f4a537c4c21ff9208bcd826c0187bb158b1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P2503792.