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 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 0x1a6fe501ee795e619ef787debe2142c0fcb844a50c1de9b88aa9e04c1225f8b6. 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/84b93876-5281-4cb0-b98e-7fe2edd433e9.json and https://artists.proofprofile.net/proofs/artist/84b93876-5281-4cb0-b98e-7fe2edd433e9.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 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 0xd62e462512bb2b5270c58eb60b544fcd2a53ab7d34450c0f555f50d6a0bb367d. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/RUMM11700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86efb42f31d3f72b58eebf5c6e4ed60f9ab55282682f254219d964ec2f860c0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/RUMM11700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f42f69b6fbae4a9a5d50735ca75ae32bde778c54eb66b9b8c27d7ef51ae6da. 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/RUMM11700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6215c9d1c26fcf3776560cc73bd1411ce89fb3edc7145cc19c1571afb70c3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUMM11700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b2a018082bedbac7551b6ba4538c704962abcdc78dc494b9c93d3f63cff571. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUMM11700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe447f6b41c5c858eb59b41d8d394e5f9442cf3da6b27d92e9b89b0e40566a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UMA171019430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fbb7e32fdba1b09dd3eb82c5c0585cd83189a124e7b55fd23def7b3d2af495. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UMA171019433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d7e1cfaae15a252aee5e88591c866dae64dfe85b8d7e7f98cec4a77a3472ac. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UMA171019437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2202f96de39836d428890875d07b5d7f3dbe547c9d6cccbe839ab85a148aad03. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/UMA292240591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38274ee3d798974d9b7edc24bc2f86585bbf9c33e1408ca929ee8e6f741d7b7a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/UMA292240592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616ec1d507b5c55c56c0c85c8b035d81f0f231ecc8acd2287ed7b0ef9ec28f1. 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/RUMU12710201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28672c74898d61c6d0b9ad511b7b1e94d5524bc0f54f1618287958488d358080. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUAGT2559954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a0373232ea2727f7f2dea623e28271af3dc9df695e189eb8d98435ba9ff572. 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/RUAGT2560775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb7ebfb61d4c823d74e4e78a5a4809f1c66715110b7e9d49e91653473e9572f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/RUAGT2568424.