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 0x00808434828b8657442d5ce8d89d856289c08c77fe8c0f6d7ba3da48c78c0413. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac2929af-4a62-4009-ac67-3b053a9533f4.json and https://artists.proofprofile.net/proofs/artist/ac2929af-4a62-4009-ac67-3b053a9533f4.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 0xd9abff182b7acf1cb78b494f7d7e97c30e7ce0e36046a96af1fa7e9be3339f5f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2501504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7dce69e377d3560a729fa9a91ca86ca8b1baa508c2a1f285c73ea941451050. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:37Z), 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/NL8RL2501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32723e4eba914aa96b085d08ffa759bbef0177b47e96ea0f00d422946b53ca6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e67cc22a6ea5caf0a5eac63ebd4ef5707e484d09fd8d6c4747b9b6256ac78a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL8RL2501508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a081e2abc4617f57f91dc7c8742854d6dac3038aa692b07de7c5fac4478b3ee. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2501510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b4dbec6c672626fa1842aa18960e2a091da7ead5b90390795173e3fb7b4594. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2501511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabf5d995d2f8d9186c0ab3698df63e2340a977854eaaa918b3ed228cf5116ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2501512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd837c4bb0ab875309b91116247b81373131304045662ebb685c779de68358b4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2501513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5356dea62aa2f3bf9549ebac1de24c45f38cf4faa75e9df052de8e3e92a178f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NL8RL2501506.
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 0xf49a15d0adeb87f48755f5be29fd6ac02d188cf864ca8a4ba361ea9791e5a5fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL8RL2501509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1e38a853105de04d865f078a7407b0c8b82be561615599fba71b5ff4593879. 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/NL8RL2458797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3b8ddfa85c3a8a999d0d237baebd2c979aff1df75516f2b310f14dea717b60. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2458798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54009a6b0b50d7e5b6c3e474839de498e233cd549d39c567224fd9720af7607d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2458800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bb9fff3a766418914b8f5e87cd0ab3dca6e27f09d99c27a482d700f52577c1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:18Z), 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/NL8RL2458796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefe32295e7d951b0d47dea0c6bab61db505a8081e65ace13d8027f3f81ad0c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NL8RL2458799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d12b19684dc766d5168bcaffdd90dc1438db311c974f42e8a419ff28aaa8088. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL8RL2460247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5f22f57e973494d8f033f2b6ae4273e05a71ee85c338ac2228139b42a94ec2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2460248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ada083bb96b89f0a71fc6a75639be17c0d7c7ee4ea023860f0d7336a32050a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL8RL2460249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a6890c8540746b1428ff1bd6c1c1edc0b764f0f2e63e5127b72a6e723506d1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL8RL2460250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de7fc7ba40320301d7b03b11b5708e5475eedf4d28121b32422d270b0f8f93c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NL8RL2460246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ab596c01a3bcf309046c4406828ab3eee038267022e28f8574cad18482eee9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NL8RL2460251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a90a7ea02c651e34e1daec4a199fa19fb1ff9c05e17fdcffc935b4b088fee23. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NL8RL2460252.