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 0x0f62bdb9115b6da0cb0c886bd47b23dca8267df34e10e8fdf2485522664bdce4. 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/b29f866d-5f32-48ea-9643-cb68f7aadf13.json and https://artists.proofprofile.net/proofs/artist/b29f866d-5f32-48ea-9643-cb68f7aadf13.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 0x5dead2e6c84809de68e9e5997fe7abd551240dfb5d593d40523d32063983c0e6. 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/AUUQ21100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2f0803c4954303c03d8856b95265d1d3d3c2155d91afa5fe2050d7c43692b. 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/AUUQ21100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e4724ac61ed0fcd837a1965172cd9d029b3fedc7514f4f94256768afed794. 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/AUUQ21100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853a5376f95e3cb9aeccf185fc492ac1efa4191cc43035e5ff6a52f501d702f6. 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/AUUQ21100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e63b2723677c5984d7c7863852f971850c0370ae53f94de1e322100128872b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUUQ21100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9bf60fa47f6d5ba31133236152b168ca7e1b1bc68084a90a9e947146d181a4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUUQ21100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f85eb2f4e0675dd8024712c73381bd1e5486129e47eca67521ba389f3a305b6. 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/AUUQ21100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3f2191c5c33b84c4c2af0dfc0db2ae20e22c998b3467775a4cb49aa107f3c. 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/AUUQ21100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb60b39ff5f26cdbb8565517df46a24870368f9359bdcddd37118acbe479794. 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/AUUQ21100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4636e96e47e3cd37b938344419e1a1d6039be40d86eb6a175606d5f2676a83f7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/AUUQ21100008.
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 0xf6957da21cf62d27f2f19c957b03a9111ada501c69511898e959ece987f383db. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:34:35Z), 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/AUUQ21100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9381ffddb4e820d44789671264a15d32d9271880b284e1235b27c6cfd9ee0cc5. 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/AUUQ21100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168131c0874d294c98db21221b9c06cadaef7a291e2c57e1ed5e3171de063d19. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUUQ21100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ceaa4f08dd43a5d89cd95c3cc3da8f30ef8be2fd1c6e24c69bda749f2b8ed13. 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/AUUQ21100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130afd12ea8ad46ce815ff218e46b016a922bb810c0be6dcd5d39c53544cd0be. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/AUUQ21100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d83736614ae11dda19c0f2d7be5acec8855a8afc44891ac0e3a6b9e8a18a87. 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/AUUQ21100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d97eb9ddd59881c4f09842ea6d8e826e56bebd8ee51ed75d5b64a37466472fc. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/AUUQ21100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eef82aac617f59d00380f0c217f324e0f0bd06271d1475a2665e95960830c7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUUQ21100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7611d0018082c9f892888ffa81102c3fc780b5a901809bd93b67d8db18458. 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/AUUQ21100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d82f4289622ee6f347cafed42f6daf40370cb4e25f2cb15536f4eaf28c979c. 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/AUUQ21100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc0fb99ccd76fd407d75706e1ab5fa4ed3e8dc86bd79960bc49e0b3719acbf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM5LC2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc0fb99ccd76fd407d75706e1ab5fa4ed3e8dc86bd79960bc49e0b3719acbf. 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/QM5LC2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc0fb99ccd76fd407d75706e1ab5fa4ed3e8dc86bd79960bc49e0b3719acbf. 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/QM5LC2300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc0fb99ccd76fd407d75706e1ab5fa4ed3e8dc86bd79960bc49e0b3719acbf. 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/QM5LC2300159.