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 0x8a62e3c977b8da79266bd9243a2e6a4319a3e10e5e676d578565881af1ad50bb. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3afb0efe-8420-49c6-b676-4baf6aa91b27.json and https://artists.proofprofile.net/proofs/artist/3afb0efe-8420-49c6-b676-4baf6aa91b27.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 0x166ad28c78e011f0f0081a3f30662f94fab8d38f3a05f31714ccdf3ab863f903. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EY2508866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549d2e2c4ee6374742efbb3331e85d39191cc9612fceea7184e91b55546791e7. 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/QT3EY2525874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde01ff0ad334fa3a9f14a70b6d6cb45d3ab10425904de0bb1cb6bd424e851cb8. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:41:47Z), 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/QT3F32556388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4260a3d040c663f18825e90c4c8dac19307b0bdfb7096886e220bba53e1eab8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT3F32553720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c78f8d74da80d4fc6053d64943104ada9b4ff538893bd5e17314dd11c15662. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:46:28Z), 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/QT3F32525162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d061b3529d6ad29eb14f4a92a16064b0dc80b79b0cdd561ee16c129f476afcf. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:37:24Z), 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/QT3F62590671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124d7120aea63c9f4c6c9a641c233d9d17e0ae944eb921b0b101452a4fb58baf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F62551648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63643e8cc1862d33802dc4e2967f27ae86c2b48504f90e16016ed1815facec6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:20Z), 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/QT3F82523361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ff8235b29e65281be0151f6c9665e1e37cf28f7f45f1e439d9fecc5a8fd0c2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3F82525495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7893af04b717882b43dae01498ebf99c0673f34d0b394546fbd8ce1e16bbe51. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:46Z), 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/QT3F82595917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97d43c04f6d64e47a5eb29db053f8fecbb46fd52ce5099e117e7cbe2465ed74. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:33:56Z), 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/QT3F82523360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1acb5708f7b4edcd330bd3708fcb2e176c99f6d1be7599a6b2983bb1f1f097. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:20Z), 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/QT3F82523319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c0bf3099cf07b93eef90aba768052c4ce690180a51d43aab785a961cb89dda. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT3F82525489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e9d9f1c01042bc9d02dd7d0d808d7ef97c4d1be5d00b435554e1e981e14ac9. 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/QT3F82540002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e88bda3c0c954fb8416d341c7c9eb4fc18629743bbc1d9a6146cae1d5621dd. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:30:01Z), 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/QT3F82523348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb270ba6ba245c98219a6b1e8cc0d2419f8662faa12f779d386056db918b782. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:46:31Z), 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/QT3F82523331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cbf38d153760fbee6202674c20a05242b6274b204f5f771369921a67d8840f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:09Z), 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/QT3F82525492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705de1115586e8545af6de4684621b22b73b8b9f594a1aa1ed4095ad85c56755. 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/QT3FA2540807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eadd84bb07e0b7d25fd96e41d2eb09c12d13386b1fd63efbd8f19c5a48d6ec. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QT3FA2595914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f6e89f72c5be28b589993ad1311500076173bb04f7627139d476b4c914a201. 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/QT3FA2538633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b190bd940e5eea5fedb974b096884f8ca5e94f963b0a01b1de681d02bfde17. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3FB2549500.