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 0xa28ab20a811c3f11e7698cce78ef88bb787e9f368011d1c337d45fbde9a24f50. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4b0386e-9bb2-40ef-9c34-5a462126c97e.json and https://artists.proofprofile.net/proofs/artist/a4b0386e-9bb2-40ef-9c34-5a462126c97e.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 0xc869f05377468845eca532be424532d608bcfc96ba4f2816ed60e9516448ce1b. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DEZC62466119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193e20a11395a3bf1cb18748b411805972c97d88266a52523be40f9e25bb227a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZC62466132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258c8c8178f1cb54c31b6a6ace01dcb58e8118710bcc7d2c10a243e3210fa04. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJO2595462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c74832a92259bf341387bb4eac8914f7ca1bf7d52bab34a42395250d32f4024. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJN2595470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f4feb3e235a6556ca081b2cfd8d9d51b6b8963f8d2bc33f501b2fc4094cc71. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJN2595503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7358cdf8765a8556c74cead73175d5b42b5c28531ee0465d10061727308c7def. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJN2595516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549af4284d767bf1104bb4867bcf167b9e4e77b2cb178cf280d4b8770ef72aed. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:32:06Z), 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/TCAJN2595524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf504353b583ab00792602b4c1d10d032d099958499b7ecb017847613ad1e84de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJN2595538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1783d77f7bc36eb3e63ffe2829499570dc6a8c7593cb7ba47dff2fb0b71d1be. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJN2595553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f1cced6e17a62cb6eb98b721994ab51adf3a1ba20a734c7b648e38974bdd83. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJO2595571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8487c5a24e675f09cf356d81f42ecbeabd5824b3f84105e884420d240e668. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJO2595579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583596e60600381097e24321436e23beb658bfa03697797a4f4b6840820bd8f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJN2595600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c53891bc2097030369159edbe38e05c24630aaedf27974a21a845f625f7b994. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJO2595605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2242fe7742ec0cee1f7fc7aeef7207586641b4a32ad06f55e57c7f4c2f7b02e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJN2595636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3ad5e6be21373e90afba692e8828a69c316ee9239c95ecd1856bd812357aa7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:21Z), 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/TCAJN2595646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae201f58f772edc794e2a69a5062edb6c75a4caff040a4a9da54db2fb5e5a29. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJO2595669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48457da9022429724e40c33325742b62b2b2f469c57200475f77cc1a5cec83ce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJO2501705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc97be3782087d2d413244f95446b1575f1eb658b10a130240bc6790468511a9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJO2501753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe702284aeaf08f8f4a467ce4d39d32ed9d3972e6c0fda9e29e00baff61bbc99d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAJO2501949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630a51fbefa2cef22180de4e0f74aa4d722e3d67950d3e314b2c63be5efaffb5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJO2502106.