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 0xd525ed14893ff6a357d819c38bc8fb3c5b175cd6c8ddedc56c8989b03cc2c774. 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/f73636c8-10bb-4dee-aaab-8d5d436aaa7f.json and https://artists.proofprofile.net/proofs/artist/f73636c8-10bb-4dee-aaab-8d5d436aaa7f.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 0x0120f311c363aaea43ac1b0dd719c2fdd1fed231fa16c83a5168743a9bb5978b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:31:38Z), 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/QZZ782567681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa519a728a031ea9718004ad8778c22dc151a2815abb267992a9b6e580f0a10b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:36Z), 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/QZZ782570202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b34345803967ffe493e06ae41f05abc3d25e953fafb5be4150f507b3353ece2. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ782564410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f316d1fea26daf65345f7815219a36372cef827fb44f605f91f9784d46142. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZ782570203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59e5aafdc63276d5f55c80fcb687695ffb773c3981ee5b587cf6959ecc2fcb8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7K2548075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf218eb3ac3968e33d9652664a2db5340bb2ee41c8cd9a55104d6716a715bd. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7K2537612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4fc9e1c1f7216bc358566b9fc53585a3383e93c960b5c548b1018f098bf854. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7M2538255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db1b20c9e3c25768caf3ad862f1529121277619ba053af64b2c3e04d06e6b7. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZZ7P2525986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26377bbcc3e61a8e1ea03c565f135d68317e91a84120b18f0056863d045fc12. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:26Z), 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/QZZ7P2505160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8aeef455fd8bd0d7d4e4be4afd2083a5ca826a4aa204039e1bf407bda16af8. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:51Z), 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/QZZ7P2505161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f74c4c699b1b778de90fbb5904f589e716771d2d514b2414a133965c157a34. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3FB2561305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cbe8806ea1b41b898b1ab47e5adbec77c0e791f49c880c79ab7c91dc167ebd. 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/QT6E72547434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a4f756abb86333699484f829ec2dff2d470f66e0d3aff316c47940bc10ae5. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:21Z), 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/QT6E62576652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa3216f81310882201babb0c171e73be345138cbfeb235be2b4665adc9aaafb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:27Z), 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/QT6EC2533846.