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 0x07719178a864d84ae160b3138f425ab69e90337b0f06f4e91f42df7b67a4c6dc. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bc68600-dcea-43e4-ae01-cd8a98ccd881.json and https://artists.proofprofile.net/proofs/artist/0bc68600-dcea-43e4-ae01-cd8a98ccd881.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 0xe6d6aa27755967acfa069fa21fa7dad24e079f2156ca3802f8b0eb2ff5101471. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/DGA0P2305880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d0a71069692da7514cf0bb143089eddfac8b52d5c2d47066542fff0dedeef. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA0P2305881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3057d26d1b42ac3223343dc790610b926a0c4701ead00f3a39745e08aa75ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0P2305882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4f102919705cea0221fab1434b7631424357cad1d0a4f98c921d9adebbc5cf. 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/DGA0P2305883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc745d0e94f2d5911bd89688eee3ebd024de38245b9673f34e103e99267c12265. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0P2305884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f97793c3e8297f539d0fb647c9b0e2599b74c841ca4d2ba3fda5402ac5293e. 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/DGA0P2305886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd7e157c75390e9c40630222d3cc596fe596002f0a1d9152b046fbeb96be8a. 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/DGA0P2305887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabceb8bf204a3863c1d47fad162341d99804784a63019fe0963113152e7deb1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:58Z), 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/DGA0P2305888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a79bd4806582e89bb9ab663b18c8d10fda87e4ab30aa4e5ee08f29eaf3e18c. 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/DGA0P2305889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1786a8274a5b8598aa63e446e9c7e76ffe9d79f89a08698113ee5266e377b25e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0P2305890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b9681bc74dd24d3811f5d81de4e9c9c396585bb1969f55fc47ebde719d62fa. 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/DGA0P2305891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9fb0e4f9ae14b3a7a1ae0a82d1f556045e0e3c778c826a49806e354ddf9bf3. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/DGA0P2305892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccdc46d76b9fc98832d60d462108a90ced0985cbab5fa260c8b5c5c90e10223. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0P2305893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d80aad056866820a759e4cf54ecc66cd8ff367f62e118e4a8b7ff3978892e8b. 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/DGA0P2305895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1327d0866ef9624826bae7d8a85b4338c9b1d0f421e75055adaf760bf9afd8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:33Z), 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/DGA0P2305898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e8dc42ac0e25e4e6047a5380f34d8eb35e0ae67a9aa99dffdc931ffe63c41c. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/DGA0P2305899.