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 0x40e6826cf4fe4104e28d0aeb03e20ab24cd92efb76872759535ccdd347409197. 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/a0876463-0e94-4fff-8602-d74495fefb6a.json and https://artists.proofprofile.net/proofs/artist/a0876463-0e94-4fff-8602-d74495fefb6a.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 0x9bd2422ae546de586f14d66ee62f8d514a93a1f7699dea8f687c83d3d744914e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972300846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea592469ba99f7250901dd28b5f729d14655e61c66a5dd83ea9a130ee757909. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZZ972300847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340367e17650e6732d8d7bf181d5826cba5484e9ba834a65cd2c94545693f06. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af71d9e4b66020967c8abb6e5a7ff5ac92f14f21d0a25163167f95af45f9dd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ972300849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7e26c8259d7559aab5a95ffaef81d4498d724894fe068068289c05d6280690. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972300850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041811043f2c0de6daf1178cf4471994c7c661eb439c640cf43f6be1934d6151. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZZ972300851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4868891e41d1fc93c5768129628611498e2362038ed6970df6909d8f270a37. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a8289ee6d8bc5456714bc2cad02924f527d66431150bbc15dbe3cdb5087c4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f43be70825c2d10b69b202a85c6a7b45deda91be42616b056aa2f68b61ac0e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZXLZ2328729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58753a9e6e40a0ced3ee1ddfd08ad6e50382ec0268922b9351580bc64a0a77d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXLZ2328730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa30ea84a02def06b8ed0b1383970e87777deabaf809eea23888e6a116c8865f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXLZ2328731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c2662aa1082459cf3de4d1711379536d6ebfb664b720e38e97fce9968194db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZXLZ2328732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1713f993260fbe927ed549842b75fcab8b3681f780c096e0b5731cb5944f25f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487547aa0ce606c4ca427ab2f009d9c34c23860b1a26378c9a9ed402492fec1e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZXLZ2328734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d03802c0f12986b0069913f4f718f10123f269982f967bfbc60d71999a367f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d064723053042a8b1e3cca7d6438973d7252f85c7032154a5c0f5504a64b0d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77b21a3d400e87f7f3052e88a55e108d33a7f17310e36841a21f501cc9cd7a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef7ee56b70b6d6160c05ea01b3ff5d7866510e26a8308223fdbf60ab35021b8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085da3bb0c7d3d733d0537e5d4812ec4b48bc8ab09971328a3c54e467cb5ccd4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8462cfb9aeac8d340e70dfd77a1ee57f65f2f1de26b2eb3492e72b091c1a86e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc7fca956c69c91d7c65ef8256036c4530b3b3d77f9f08c66c398798a20e59. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212dcbdf165efcbc10f057a3f6139bc0606ba93874a0b52df2c707202b368b85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZXLZ2328701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7aaffff4da734ed99464700d185eda9bb293eec1a2ea5c3aedeb0691572a34. 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/QZXLZ2328653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d20cea3cf0ed8cf3fa36868bae309fca5e4be7c539c910d3823893c688b76. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZXLZ2328654.