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 0x69f08355aad1e2cbab56bba2294fc9d41aeb7ef9741abdaaf13f7cb868b04b60. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7e6c81a-329a-42a3-b0d9-5c0c5d35132f.json and https://artists.proofprofile.net/proofs/artist/c7e6c81a-329a-42a3-b0d9-5c0c5d35132f.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 0x628ed6ea79bf3cf2e5a4c22bb0855fb20e1c38adbaab990c117dcad4dbe6d861. 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/QM6P42082576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720010fc57eda74c175cd360085b7cd77f1207758a595d41321d69bb46f4ddb. 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/QM6P42082577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a34b175ac667b9b45699df0964f6ea91540062023cf6316ded4b3da4a0c1ae4. 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/QM6P42082578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5439913421278a7d4129c751592052f271f286a2b699ab92989dbcb4772a503d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6P42082579.
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 0x6ca5bfe2badd971e65d1d8f2340bd4a0ea996f48a8912c1585785494a56d3c5e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM6P42082580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3e81c735409122098abf698f90fd022ba34e84a9e9a84b65721a3df6fee30a. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6P42082581.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c0b5564a6265f65c653c17553cb004fb271e76b11adac01b64baab1618b74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6P41993497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e624956bab22a7d7b7e934aab8bc88629a4cd800a8e29483635a629181006c4. 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/QM6P41993499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a6ad1a78b98f173b2489bc992088847dea77099319126edf3223513819ac13. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QM6P41993495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4dbbb6c1afb7ad8395348648026ce2bbcf47e9bfb864b9882545e2359d6be3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6P41993496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a39c875095983565571ca99df51edbbe3b2c5423090d00908473afecd59dfc. 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/QM6P41993498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31485ff85e7cda7ae2df43c0ea36f5c5a6aadbce9b7327526de50a11f15c6330. 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/QM6P41995876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42321d840d75180cf5fca724b720b841cf285475965655880fa5874a663adad2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM6P41993592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eda53f932230083211da688dc1c988325ffc24522f7664885e9455664f03857. 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/QM6P41993593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be53820f098b19fa15b4b35482676a4b82c805b1f4678ea2b013e55c9363a52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P41993594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb217de263070a8f38e3fe7c748daa66b1a17a78b560d0a179a8fc515af78c. 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/QM6P41993596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7815986bb7d8f0a1c4d866c058705079815728cf19fae7c944e13a25b4b1bb52. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QM6P41993595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a16140259a4c77c9d9593ce1142cbe19593876c8393913862c9bec1482c6841. 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/QM6P41993534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556e924a28b529f049a101cae52ca5003e9984a8611fd7a8dfb2d90a9a6bab9. 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/QM6P41993535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116a4571b4ed51cdb82014494b38cdeae5598bf194951bf3f8285f6723bb0d72. 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/QM6P41993472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb7000e34a584d032c731220fa2636ea45bd37039b84ba01cefbdf0c717c67. 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/QM6P41993473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777979a9390f7631fdee7759707dce11263b6fa28bb8f0c39fdc6acbbfa1262c. 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/QM6P41993474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc7b5a37b62e8d557b5b6f65a5bb6caa48cc104659b9dcd737be936cb4e1ba1. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6P41993475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bec62ac1e80c6d85dd6feee52e09a9da8532cb765cca1cceb662271ff302c9d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6P41993476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ed820aa6d248d981877a320242de28d96aff7237998f10ea30abc2525fc798. 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/QM6P41993477.