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 0x975a2f1ff2cb3b26afcdd2fa26d67ca0386d6a2a6521d6398032ee9881486861. 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/a1c53a6e-2edc-48e7-9030-dbbb2c44fb14.json and https://artists.proofprofile.net/proofs/artist/a1c53a6e-2edc-48e7-9030-dbbb2c44fb14.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 0x5280608528c6cb0b3b300f8af863b4b139ba75f6c115ea9ae56af63c4e05222a. 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/US74F0500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e03ba54351870f00dd1735dc5a99177df56f14606b8087fd3c63c4695b177a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLS1984730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ca6e755b344c45513a27019a3e27687c58b757c5af6b7a4ef4e07bebbb65d6. 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/US7VG1971422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e03ba54351870f00dd1735dc5a99177df56f14606b8087fd3c63c4695b177a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS1984730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984e429a823d8fec14615a144ecee68e4c7844ac0169900493091e1f6f4a6b84. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1989007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbe882b6437a5d43bbbdf39d4728db269dfc87a4e8bef6c2774d9df13a812c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB2048521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b48c8114fc34cc3152d014c3426bc05817133edb4d4a65ae4de6566c081e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS1984731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ca6e755b344c45513a27019a3e27687c58b757c5af6b7a4ef4e07bebbb65d6. 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/US7VG1971422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e47e6db73e4b574518157f21b94108b71de0a2b9fe07a98063cbad1c3e08a3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZGLS1984732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19970731e2f922562af2bd81b74d11238492bc22d51fce7b5712b1c8ce572a9c. 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/US7VG1817455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33da3dcc730f434cf9a62a874546c65eb83f41452e4e973fb8647a8e796f43c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS1984733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb34973e4a23119cc4939473326b9eb76984904f206ad76dfa2051336c77861e. 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/QZGLS1984734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2f89258026166c42e2536321216ac9250d0d4d3b984a1d9b5a5e76457f69e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZMZ92173952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b0f754a51ee41a4de90eb0900a3a8b6a435e2dec86b65490d669371564a7f7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:29Z), 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/QZGLS2271541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f832d36771001324f8213ff9b0fc4c18c776681e8717c38286c8f5e87a14c5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTPX2488292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa7472475c772fc974d783e469aa06926d22f6833e9e25f61bfaba9ef89b0a1. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USLZJ2586803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851795a6a04bd37e143470d0ab26770853ed9810094f5195b3b77586e8eecb33. 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/QZMZ92303229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9970204c65bfdbc1c490adc229e80c766c67d81b5881e755f5e61cb80da3b229. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:12:16Z), 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/QZMZ92474357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6973e66a96fba13d273dff965386e932c56b95ba4e6a790986e5eb614a125cfb. 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/TCABZ1463976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de2a8835d770db1b9cb5def3d0d6259f6d648dfae76eb215e75b039f30be26b. 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/ES5152000496.