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 0x63862dcd7b0383343fc1af163ebed0150f84af9e555474fd1d6361aef09a1679. 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/37d4c66b-5f4a-442e-8241-17f08cf9a430.json and https://artists.proofprofile.net/proofs/artist/37d4c66b-5f4a-442e-8241-17f08cf9a430.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 0x71ee28878dfa4ef55877a3aa6df4419780f6ab4c882f06f5d099be39f247c938. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CABAD1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137dde4cdd59170715e93adddcc4ca4be6a81359eabfc88a9e31b66ec1f5f256. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAEA1843948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a68015446ece23aa6cdd226ac37a2b3947bc97d2a5a6dad5d47a35bd6bd2d3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAEA1843953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6772dcb1e54f6e9f1c505496fd489d6c758d7b7224896f47886609871d94b31. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAEA1843972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07098c0fab89cdceae5c27a4d8f415e92d51e8d114a819823802a75b57efcdb8. 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/TCAEN1986883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec98b8b44dd5f6f84496f1f9f6c2448aa728c631a12629c55938c9ef16f50b9. 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/TCAEO1910333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032649e45426c96cd2c53e0fa11f95d2cd0203a684adf9b0d76057b208e7d3d4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAEO1910355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85477fa4842c1e566fb987079fb3924c4f6aff3e504a1646bff12ff5c0ae4d9a. 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/TCAEZ2027201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65c09e7bf02226e4fddb91bfe620cfed24356ddffbff337acd6ec58b63b916c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFE2047839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc1feb28d6fafe1c5156ad9cf539b16d640371619d7978a31fd0f1dcbcb344a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AUGBT2319594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cc16a3e9603246e7f041ae9d0de3aabed72527aff811ba11b6cb318b87f0e5. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/AUMEV2425036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde069677358bac31958adf6a8f162198b6da9350638c9bd03eb538ac4d209d96. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/AUMEV2442261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f10b1c1eaac8850d536079e4537fb176c152dd947b9ff3bd8f5784c38f3ba. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/AUMEV2447431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2e3abc77cbba91f0470d59b0779e80fbfadf53fef0abd394fbc6403b324570. 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/AUMEV2447432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfe8630eb447a5cd6e2e29c75d00f3c35b7d6e8ee84b35842b3e6cad6b5fc0f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AUMEV2501424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9fdf4ea828963e1a2bac1a2cb19f6ffa2f30b2939ce099ffe35001ba26e68e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AUGBT2480266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba09614045e261344baa0137bfe65109af2185cfe847df424fd84d7d0549f9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/AUMEV2534234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9fdf4ea828963e1a2bac1a2cb19f6ffa2f30b2939ce099ffe35001ba26e68e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/AUGBT2480266.