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 0x64d7790edddc93410af02dfee4d9278641ab78d366c5df390d46b66fbbcf0138. 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/d7b5b429-4bd4-41d0-9743-16554a044e1a.json and https://artists.proofprofile.net/proofs/artist/d7b5b429-4bd4-41d0-9743-16554a044e1a.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 0xaff31a2a79f56beb9cb0afce91fcd6e7afd689ad2af37bc8056b0d5583398af2. 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/CZA168100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5116e85b6853c0101116c9267ec7b1d4ff739da607739cf86fe8aed8a2bcb3b8. 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/CZA168200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adbba6e46706f290ee1a7f0d8c7cf948ab84a8ba7ac2c4edae78e32fdb6f4f7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CZA168200397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd426d7ae1878127a402a22cf2b7708f2647e93425e9b62cc1eb56c50d0adecf8. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CZA168200398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef000ba868ab45baf658a9841f786eb903d1664eba763a9fa953d23b446f006a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/CZA168100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb70b96fbc5f5107d6cb573fbefcd38cbe59c677e93428eb13ad696e200ff1f. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/CZA659151648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc64cf3990cf764d01e0761f54b7331d4bbd196358c2b786bcfea6d7a1b110a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:37Z), 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/CZA659151653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe74f05fbd09e496257b8232ba9ea9a0b2ee5f53f3a3ed43d66345d0f87437c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:42Z), 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/CZA659151656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8542c4272df9be2573b8f718408c015ff616927e3acd846d8089b7c27549ee61. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/CZA659151659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba95be6ce06c4a00f717c84de8a6cf41112636cb37fc6947940f0db78d1a762a. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/CZA120004012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5deb3a671384a43815e4c9a55a01c1c69ec046cf6ec857e18fe7a067d743589. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA120004013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55082f7e057efc5049c31e25b90d4a7f5c2fabf0f336ec00a972018592790078. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CZA120004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f92b71f5f5783b93fcb25a3a65438deae8091f19e79a3e35f6ee9fd8daf952f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CZA120004016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d3eedca6f318a4bfc0e3c490093d16fe45bb869d8e6050c7c94ed88449ef98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA120004017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fde7ad5d2804bbcd905d9e0d1b8bcacd1cf8a369ba862cada77a82445f597e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CZA659252070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be5a9db0af77c1f2a237d235fde39ac7c10ea34771114dbc048e5314fa55474. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/CZA650201469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c0394668122448bcd22af3544c4857dcf647773e2c185aa1b73b9eb0a9e9b2. 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/CZA167500313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7dcf680fb36bf48f7f6049af3bd92e08e3368410797a87e5b5c3c45ae8afed. 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/CZA167500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf97028167102bfffd217cbd70d771d7f38fe2d9ee3ff96fc2246a27e81a0f. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/CZA168700360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0b5d1db06023721f29502ef8e7aa87efdc435dff7cb2b6516d4a634a98cb5c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CZA168000943.