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 0xa4a679240c94370bd19b64215075ae4b2b9e60f0f20b47b30871069c6dbd6483. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efc2af45-1e89-4f51-90c8-16e50e64d1be.json and https://artists.proofprofile.net/proofs/artist/efc2af45-1e89-4f51-90c8-16e50e64d1be.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 0x0adb4423933fdd3b394cc4aebb21042a8e5ce6c35b05b327ddd3f9ba21f755ec. 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/DEPI82501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda321f14c1fa4b10440304f56d174ee959f101f27abc4d4a60aa5f96ac8af1e0. 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/DEPI82501820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27b1b94f97e79c546b86e2fbe9d3503158b0c0290576e9ada93931c61f755e. 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/DEPI82501827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d45f93c4d7971725509fe62f447c1d2294ecac6edde0f0d79dbccfe6b8d1cf. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:09:19Z), 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/DEPI82501824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5362167ae333e976ab6254772401df96224a48b03e252f163d91265c6d60ae2d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DEPI82501826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d8f5675f5c44b03bafbd3ded6935097b6d736c0d8ae159f1942a4e1af109db. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEPI82501829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5420b6605cbcda59c0c7e4093a9d11d5937a5ed394ebff96ac05823cd10271. 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/DEPI82502002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6d4f22ae9e9ddcdf471714f8774f659bf1b7b600c4f2e9b0e4d1d6fcd0a79. 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/DEPI82502004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a952f38c7edb84009c3f9f89a3614f6494b8522ff4d324203a473a1af358e80. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82502011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8a593a507a777018f851f078dfaab25d6c1bbe349eaaccd429a8cab7bbe4fe. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/DEPI82502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7d89532b182eb330fe3e98c67abe061a528a3f2306453f2c1955035e9379e7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:16Z), 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/DEPI82502009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd7b8057532fc6241d039f3e279b37e5de69526a418d7974500cea08d865fdc. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/DEPI82502013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e51ae29cb4c309c7adaa3ef960831c86788ac99a0a7c0ddf2b6be079f3dbe. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:32Z), 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/DEPI82502014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f809a4b4ea6526f491b6b64eb94b83f4c28a4aaf39e2e67319f6950e4338965. 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/DEPI82502018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bceecdcc394bbf8d19a5bf5009d93a057c23f49ed20cfb7674dacf6ab0888e4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEPI82502017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fcc5a837651f04341093e8b65b3340b1e1a29a0c68354289917c4e73315471. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:20Z), 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/DEPI82502037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa594266fe4e230319cabd607a6f2e067e684e2cddf217a11c90054c89f5ae032. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEPI82502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5079f77604a65aaf85a66206b80a5cda664a577f8b4dc1534bce937b9878824c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82502023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060e643100f439378bf14291a180f3c74b42249900907cf8fd4a18f0d3949ba5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:11Z), 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/DEPI82502022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29040a342f42022a861ac804751d6cb91c726801f1577e59014b8383a26acb14. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82502021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ce1c3eb71115d0bc009e9eaa5128cc20914e54388e2590465df6a56d9e5cd3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEPI82502038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653ce505fc293da30f1fc29efe1b1b8dbe48db0f0b93064a63ac001be538f1fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEPI82502039.