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 0x66ffbb9506072c925f57fc7948194d4033dae57720c368d1c89884c3669dc46e. 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/1023d53e-bfee-4e75-b2b3-54c01f06d7c9.json and https://artists.proofprofile.net/proofs/artist/1023d53e-bfee-4e75-b2b3-54c01f06d7c9.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 0xc385a2fe01cedb6561e5a561654fbc917be302e65352d47cc71cc908dbe14e97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB32332499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52162adfa1de52eb0adee9c8461fc0edbae3f9570280ab26f50672a67c443cb. 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/QZTB32332500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff27ca434c788b79c4e188b5bfc2be9cced96b1d47ca8e7229b40ada750dfe6d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB32332502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bac0ae9d9e8629174247b56257af450f4f1e3c35137ddb809dd9c32b09450ce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB32332503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4451a27cbb40281e5a8715cb852addd43f1d3e296561f660259206dbed70c53c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:24:54Z), 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/QZTB42328850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dc340d658adae15f14a2251e1e487323db98f4d25508fabeb258a8e9087d49. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZTB42302191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4334b8476801e531958acc401be061c6841155c28d73dc5932e365087e9ed42d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB52331038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc0a5a0d93b7953b004d37bb9009fe3eea155e9b1e82420dfab76f8f674a86a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB52331040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42253492371245e2c5056c2b95b6699605d5dffbf5b5068c1d035be89e279afd. 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/QZTB52364846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96134e1e59d751e4389cd3a2636bcbedf53290d319a206ff84ab3f8f800cc940. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:43:56Z), 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/QZTB52364847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc832652bfeba39594065f3e65ad279bae4eeca6611d758c5ad68c554ccb5990. 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/QZTB52364848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc352eb169f0d20839e1e87d15a628d60f2b688c2e1435f8fae701901f59d2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTB52364849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031e50521e1a2e6bdd2f6a39a0a280ccd643d6cea7a5f2f3b8ead044a03bcaf1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB52364850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60461ed1e183d553944692b62d8ff07353c0371f0b8e1af4b3cf20250dca50. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB62308753.