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 0xf638f1869835b0f41735ea6004ba34a93808a11355503477ef14a86db4c20853. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/648dc62c-bf29-47dd-8f13-8564b1570d8b.json and https://artists.proofprofile.net/proofs/artist/648dc62c-bf29-47dd-8f13-8564b1570d8b.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 0x1577bf562a0a8029103d30af826eafb249e60d0f55b574c6ecae16de8e1c82fc. 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/QMGAC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1243f9591d9bfc73c27e6cfa3ff79cb682e369ec6b51507131fcc481a7a0c94f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMGAC2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d7f6afcbedef8ebfe7c709a162cb8e50ccf66a0132f4622a5421e446dcb35. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QMGAC2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee6cfea3c656b033ff1b97f721b91db8388d464cf18a37600c604ed467cc3ec. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:12Z), 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/QMGAC2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d43beb6d7e41da2dad75bf4067aae756192cf3a2bef75939b327180598bd34. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:55:15Z), 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/QMGAC2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7b9cdf305abc9e7ab095e7e30b136e39f34f808c5f766c4f10ec11f9109f1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUGBT2462922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61784e376f01fbddbd20578372cb8f9a8e01e7f677b0689b09d3a7a45a421a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUGBT2492728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4267d994d04a97ac4a9b10ae683a67546c66795082aefca434f8f8006076bf. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/AUGBT2497746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc552fb44e0e824ba6eed7f03110694f9c09577cd1ee9a1e283d6f989ae6e330. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUGBT2403361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c7b9cdf305abc9e7ab095e7e30b136e39f34f808c5f766c4f10ec11f9109f1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/AUGBT2462922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa512e62cf88b85f2510b31201cbf94274a6a0545289858c449307fc58fc2e508. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:09Z), 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/AUGBT2425565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db16610a4dc186a9232ea8e7ad8f488c7754220f94e33580942b15776b6daa9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIA2451382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6c90a45d86a00a866b8d01b44948ff22c36da0ac75b5b32d8b7c67e3f3c43. 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/TCAID2433388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d3a2fec6fa00d577e5fb362b3d06692b32f0304dda087409b3f8cda9b7af1. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/AUMEV2528220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61784e376f01fbddbd20578372cb8f9a8e01e7f677b0689b09d3a7a45a421a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:51:30Z), 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/AUGBT2492728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4267d994d04a97ac4a9b10ae683a67546c66795082aefca434f8f8006076bf. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/AUGBT2497746.