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 0x1ec67c6f753a42accf66a1bfd460df06da723ccfdf2c1968023cc7467351c27d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f22df4ce-bcf8-4496-b389-a0be5ffee7f5.json and https://artists.proofprofile.net/proofs/artist/f22df4ce-bcf8-4496-b389-a0be5ffee7f5.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 0x5daa0400d1db2b6dc852b4c74d3f74aa95bd8de7c2c24a7ab3e4428de064d716. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX53U2456434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef92af9dbfc558c213bc33ebcfdc75f205831fea596558cff6c3ba9c4e1ff36b. 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/GX53U2456435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa101f34dbb751be1e94dec0cc7a9bac5b4be6ddc1737b68eff95f191ffed6d5f. 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/GX53U2456436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235f51d5d780e0bb89fbad320bfb720aa116222e881f1fe1d19f62764a057cf. 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/GX53U2456437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe061d8aeab52a90da722a7fb89e40139fc002798987493dc002597e7949143cd. 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/GX53U2456510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4132c0a466f0fac53f95b46bc6a69eaa1260210dfa0770719db50ee04cd19b9f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX53U2456511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2808e7dc45b5e42736f0e2adf4fd1dcfbb9145bc1c7f7c733fdaa1d543130c3e. 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/GX53U2456512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54319634c6c5be6ca8494f3b4e3da84efbf1f3924cbebf63ea8bf1a541a206ab. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GX53U2456513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff2e23442edc2105431357cf516731c347490906b7f9ef8e4e1b12cdf5ee29d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2456429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533e5f6e943f85d75b7a9c1a6993a747d0db56eb376d9c103edc9d4012e05cc. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GX53U2457229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde89bbc26147a4f208146aa3da2fe01ce9c164412b43bbb63f4f1ed7820728af. 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/GX53U2457234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac950fcbeff993b925d96ab69b3df4ab7a218d495a6d77aa41d6cf3b9629a8. 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/GX53U2456409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81499696ce3c98f21acb707e88651f5194903e3a259d7da08469424ac9a892e. 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/GX53U2456428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca21091226225737166cf40e35b40047d144e12d042a9843ceb65dff14c5124. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX53U2456492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a06953ae33c4c0c2f9690b680f53d8c5703a9e0532936c130e18d907ea48674. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2456493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41f4c010951c8186c57851c48a2454901be994b2287715fc2bcfbb86d56d8dd. 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/GX53U2456494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd2b95387085ee25fa4a67d028a28fbf0d77fc56e1e958e8b7e2ecb5bc64b52. 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/GX53U2456495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53e9c6de59e9422c1807ee72f327c7590b67d96ecc51994a39ee50e97389318. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/GX53U2457233.