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 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 0xef62078a5b02f0735ac75d36aa650993cb58f95d38fbc23dc9ec3f6b74ed6d5a. 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/80239564-56f2-4685-8673-f5b152d8c769.json and https://artists.proofprofile.net/proofs/artist/80239564-56f2-4685-8673-f5b152d8c769.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 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 0x436e9ac09ae2577ee34271faa3c28dad4cbf023d0832fa5eecc931bd725dabe0. 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/GB9TP1700463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980a533b737a8d65343bd31f206df0a6c6a0b30a1a244c6c42c4269873f3fb8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:29:38Z), 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/UKHTQ1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15edbc39a799249ced4a8f09250242c6c309ff9a8b2343e85f066f68aa29a7cd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:23:30Z), 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/GBKPL2148177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c91b0ae89c277c40009ec651ce332205cf043ddd3224ff48094284bb780ab. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QM6P42227294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52a24d0dc934e7b4a30bc9636552a423ae1aecd7aedcdf78e4479e612b120f7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM6P42227295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bceefc1f16c0f8d1b6a8e7f494f45456586942be029b91ec37df15fb72469cb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6P42227297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da065a7fa90c82c83b19ba423f3dfc627643dc9cd29833ef350c92fd89f5b1f. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QM6P42227301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cffe18dccc00cec96c45d4f2bcfcd1cbf6738205020ef346a2c3284756a25b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62382014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a5c1648d9d9ae7163ffdff4a357a1664d11f0310f2d1b545090c48ce7242f4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:38Z), 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/QMDA62382015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce6ce336934fdf8b2d29107b60e3881c1511341e1d27b14d4a768e1f8824fab. 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/QMDA62382016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069b2a80a16b72d1e845a0aed1cba185a56dff2dfba2683be5efc7f3813d0401. 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/QZWFG2440112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6dec2645da650a1cf42d96486f98a48b2a1d877e777e21e1608f20a5a3d1d8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFG2440114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb8e5b309ebf44a722b840d2ea08911a7bd24be06b22ef7459f003045f1b499. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFG2440115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406a59c8726a60d8d89ed4eaeacc07f02d3d9d071785827940716691d6c7d37d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFG2440116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e8c81e4efc4ae6e9fcb38f00652d42cd344c8e8a1ecc0089d6c3829ac77d40. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFG2440117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefebfc9bd5be72e9401201d021a8f4d93c9a257abead1be242ede6d7d27bdf5f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFG2440118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c61a49cab8ccdb8f2c313789331dbbab963c551729826ce966974d4bc0b04d5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFG2440119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e25c3d051abf97ec9191e5d37144701529086f52add561fd889479aba37fed. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZWFG2440120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca52c6d85001b8001d2936baef5a01a03c9a5a51e8957eda60876af7e620b19. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:31Z), 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/QZWFG2440121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9459a94cf3bf322e89dcefd9d1bdcd47ae8a6d1551b3afb0c66553e4cae0789d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:55Z), 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/QZWFG2440122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3489dd2c6651690480aafd87fccd552cb85ccdf91b64af9b427667b0976177e5. 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/UKXFX2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d718d1908789f9ed629f948b114cc518706cae215bcd6e2ceaa5cdd02b1db. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/UKXFX2500002.