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 0x39449d119ebbe54fd131b9602e82d3cc0f5d0a433f2bd68b7c257ccc26947372. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/441e3bae-95eb-4c1d-aba5-d4f2a2761573.json and https://artists.proofprofile.net/proofs/artist/441e3bae-95eb-4c1d-aba5-d4f2a2761573.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 0x79697d677dec02ac4fbf978cfa9a61f6fa587200757f4ce30d4a143934b11c8d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USANG2264632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e5765b1f788efc699ec33e092abaa2d3ccf53e59a0afdf2b8010466059b55. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2264635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4daaf859d3a92592716f6afc4d6858956e4e642b886541b29a1885f7f796151. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2264637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc233e7b48789e7b011a7a6599698b6b7e795564591879d0e28799030acbad630. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USANG2264638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a78e9dd91e933484e89e4e7fd677f97763f90c7e85e4e916b364c440537c37. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USANG2264633.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0eae8835aa39686f398c6ac6d62a43f3a2d23b8e70cb8671f8514fc77b31be. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USANG2264636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457ef68b5da0ec4a8ce9898dbc8eecb2df5395d306fa9c92e6b6a8b04ca113ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USANG2264639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5801201a4b60be53f264d2719856d7ec6a433b1049e6380d3af4bafa3a09e7a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USANG2264640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1ae03b62edebfe1c77ddbbb1185b65166f9580145e17b682648060e2416d9f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZFZ71991892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b3560a8c19b9d0024e1902d51c05f2b3170c5c2432f3dddb6f5f3b0d7555ab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFZ71991893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fb672e783cdb44e76936b4ee4d3d030511946682e9b360ba21a1f52fb1583f. 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/QZFZ71991895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfd097eea4ef848427d6feceffdede21a293df0f9a42ca26da80831baa34d24. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ71991897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf58370c25dbc114c143acd81dc60b571138fae40f2d9f9e50a49a348d7487e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ61979527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bada92c8f0f79dae30472559a52f9a62c0207f1297cc3a1f85bc1347d564979. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ71991899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c11baf228a41a8445419cf1f7c806cff648579ca3d5b64086efd483bc68722. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ61979149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee93568f2c72e4d2e85004662e12c7de6655dab40eff3d2e715c9e36dfbfe6b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZFZ71991894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21eaebe7643ff5b14bead2adf5eefbfe7f507a76ce5134f480fc8340af949f3e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZFZ71991896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aece38f8cef1bc91cb1e60db0c47982e3ec78b7ef232bfe0124c0263e62b03. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFZ71991898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509edd4a1928652de4522d7fc9e9b37f5b3993b7eb400357d8866549dfd21701. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ021807144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac31b1a3b697902fda1232a0f1b50323d73739ca0d569c5c92c3eca9fa750c29. 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/DEQ021807148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c91a02c6cdf1270a09616391946c9cf70a4a76953294c5d5b9932d71b81917a. 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/DEQ021807150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c3b959fea9df573cbcc59a33a116e6794eeb1fa25dd3f04c701cbec06037a4. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DEQ021807154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0319328d8b702991e7dfcf7f33195344bfadef86be311af09f90e6663268613a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEQ021807146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac7e95906081f7a9a2c2f769fb9f356c77462b37c265496548d394b6156e64b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ121751783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9fa4920cba33125b93b2617addba9ce3ee9c2afc5d8fa2393c019f8ce45bb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ121751784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300e8147027a28632774c8707d3055e6760523cc4aafc3515f68889be361c3b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ121751785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84419052e21b77564a36a33405de55ce59517ebcf04201c2aa21c24604021e3b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121751786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f280db2fa30df6695d583cafa930c64d2cb7e67e6b52f6a395d7202c459f02a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ121751787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bc86f69c4e660453e5ecf2b3cd88c8b6599c288acb0d5de43a57a64c9c7a60. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ121751788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e986fb4a3d4288e6e8c65039fc231c37a4113bae3526b5f43d2e6bbc3fb02. 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/DEQ121751789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b1055709cda9aa1ec4727f8a53aacafd960593ce9a7f2a54a0696d1cc0657c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121751790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf5e5aa37a55f8d0524c4a93350390724044e371d960e530f65af41c777cdd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ121751791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6d841a808d3a588aa2e85751ac18ea68c24f9105c9e36b4db7ffb87156f88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121751792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d82073757e7af438221b8fcfb6d0d0b30999c380edb6f788da2ebfd7d02981e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ121751793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1177458cb6eae9b36b7cf2de07856946deca93d7ad9d5cf63f14d78e0a1b51b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121751794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b61a6317715ddb05f879f69ee20c2353bc14327b42a40c385abca02b2c5bbe2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ41977900.