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 0xf2693b9fc987a3a081a5d7f798afcf47e55a00c1840fbfb416fe222f534c7193. 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/8d472a31-5dc6-4ee6-b2a8-6b1e042889ff.json and https://artists.proofprofile.net/proofs/artist/8d472a31-5dc6-4ee6-b2a8-6b1e042889ff.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 0x300b429ab98c57d3ca473bce3df10842d831032c5db93772ffb20fda30a547e5. 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/QM4TW1972978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c8656569a651eaa57755a7221621560350c44c07abfabee94f8f04adfea025. 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/QM4TW1972979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0279e319fb159895e45cbb009ce5922a36fcd6ca14a1e98f23fed98fc1809d6d. 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/QM4TW1972981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbdf0cdb1e9a05c9ce479fa40064ac02eda76dba690960f571a4ad010c31a4e. 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/QZDA71874252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188102f891214da73e985b6ec89c6f40c0c15595a53a760946dc9e2871026f86. 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/QM4TW1972987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c9501dbbb52b8e5ef7d9e23ae52a489e74f2478bdd503c1f731502eaf24549. 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/QM4TW1972988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1859ec177043a69b9626b25da24e9d3661a646345669ce9f24b1c3e558490a28. 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/UST8K1817794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de842a47f1003c8a653d064418f577a93c9d6683852c78f48f8d85fa57a7f8. 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/UST8K1817088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8f15bee29253b03af5e7e5a82a47f2c93cf3719da5fcf39ddf3c8bcddad611. 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/QM4TW1972989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242cd3d2531ad200bac06df00f7789b0b1407eb43782ea16b6cb244f56f3a770. 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/QM4TW1972991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf607ed4e7dc3cefa300b35975fd37732189f22c8d1ae5382de7692a22e4948e0. 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/QM4TW1972992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4f78e5e8d90086dea9e1aec8fd112ed826034da2c2feb1dac1096c6e97a3a8. 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/QZAPG1763845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a6e990c12c0a3fe0f53f382458def924f8ae6e382f2f519855e282d1c37713. 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/QZAPG1763846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b19b208e8e2ea72d4eae1f3dbf57a746e5df7de7a8e86e571c760661d07e09. 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/QZAPG1763847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f812deb8d9a817cb88488968787e0e619d6ddbf7bed4ead49b0c532e74c762e. 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/QZAPG1763848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528b7bf273d614bd0878851ec3f423801f4ced1db71f73428b4b7aeaec405074. 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/QZAPG1763849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50c8392298c81b0fd9381b26de31a752ceb9daf48a3265560ac4640fa674063. 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/QZAPG1763850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9c651836daf67e2cd629d1c739c432a9d12956ec76158f6c3c62e77013d7c6. 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/QZLBC2202056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77856b6872f5525c623107f8c32905f98a438d5eb2413de48c07e9a633d0b36e. 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/QZDA52082740.
Wood For The Trees (Gone Gone Beyond & The Human Experience Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f1fc15020b37e76098d1b6db0e82553bc167a8ca47747f1ee7625fe9fa91f9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CAF5R2000135.
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