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 0x3a3af372a9a471bf27dddfb608709f201f8370a08120e69c613cca4deb1fd229. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f1106a1-8fbb-40be-af79-9b7ec84431fd.json and https://artists.proofprofile.net/proofs/artist/8f1106a1-8fbb-40be-af79-9b7ec84431fd.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 0x6f7aa0bed72cad039623f91c5359c7b073bf4156deb0ae5621348d48b595aff2. 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/QZZ7S2516636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68e1ee9204204360bf6d77c2b7bf685ed376a0a4a6bd745191cd6215fde6d5. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZZ7T2556308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9a642e591744a3a999c65ddcd0536ac6b7c9c6f2cb86b889e43039852c0b9. 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/QZZ7T2561468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad04d6bd759e03e4ce37ce66f6c7ee014ea5a5f156fd8ba3ab06aa8ec2298d6d. 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/QZZ7U2502680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15edcd2b0b3faca92cab10c790241ab8391001d5cf730edc50b3faf0f927566. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7T2595818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b492e9baf9682b7eb97a32597b52e7d1c22b59d24a3410af7f24f290befc789. 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/QZZ7T2566937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502598f9d27ed368de9f34693e46eb08d01c28a1639f61a730141a185afe0313. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7U2517126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcc662a51e1e154663604905e5408dcfe9dcac724db7312dfa7a44cafbae3d1. 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/QZZ7T2579296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac47ad90ccfafeeb139e56fd2b19bb276cc7f3572dc205385d8da45d3075ca0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7T2588964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837443b8c56451bec2927fb8decb21692ec2ffc459a9bcf9e1b35e32f0a6b115. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2500312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833386f44870b7d8c7dfdf89e087241f06eb74d3ae5e8397f2738d3a2e807db. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7U2506389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88ca9a81e9be97e5998c8308f0f24648ffbba5ae5cfdaf0d167e16d6b37be6d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2553293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf27229ea5b90d43085497b877d45b7d06b4c3b4c34d1c7af6a5efe117b5dca. 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/QZZ7U2547322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d25a23e5d10548ade80821948d476b38af409c124b53e70fe870cb0b735b23. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7U2572821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6bd6f05acb75796ea59b61a23b7d7eb07273ae1052ce8d662f7341fd2b26e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2550146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3503033f207d58396da0bf47d2560fd3d1453d0e2300a754e23f5e0459be17fa. 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/QZZ7U2590195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200572385a86209d97d8dac767f40723d2f8bf154f17da6f8a124c66f62abdcc. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7V2523866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca62892246ee2697bdf3380b9e551b92bd88bcde9f9aebc37a76acad17579a8e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7U2599015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1f7b14bd1993201e74fa1b95dc57b66731e16c70161dae329049cbf5e451c9. 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/QZZ7V2506782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d6d8b9543e3ecf93d41f7af8da698c8d2d9426d06170b2346d917396a21cb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7V2555960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c51d275aa10c597e50c8bf0dab72862db78de9fc5e29af8c192e08a80cf57a. 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/QZZ7V2578122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa159c927ade6f998c2e217ded0ca92daefcab6d492c88fab9519cde8f403371. 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/QZZ7V2560458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e67cb48317c153dac48bf9c19d56c8481b748aed1a887e8437e39d328c1bf84. 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/QZZ7V2567625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe813148d0223746953c2ebb5b755c1abdbab8eca25e95f13c1a916ac95ea95b4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7V2594263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7904697536207240cab688012f9eb62298b2e25de284d4c26f0b2f58b34ee. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7W2504737.