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 0x6c19a7c07751b28e37c351029cefffe297e879774be19bf6161c37f35591133e. 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/0134ba25-0602-4ec4-aed0-429d7dd8fd96.json and https://artists.proofprofile.net/proofs/artist/0134ba25-0602-4ec4-aed0-429d7dd8fd96.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 0x5f64ccd07b8f4b7491e441078fef00061909aba6447fbeeda6d352436fdbf528. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TWL051200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d25771734d01d0d52841ca81031b91d56b04359bb46dffbfad163565fd29487. 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/TWL051200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d338ed0a48a54d5b349d4b65a3087deca466e2903431f322e2274afdadc4ec. 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/TWL051200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed42eb4817fecc1e6c6d38a4313bcd6bb2d2cbbbdb0c74e3f2afe495bad43e. 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/TWL051300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ae2693338c0836a56747c23bc7d6160e2f5f82df31379073e0356aa9e23e3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TWL051300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f824a234fb0d02a5f66ea6c44ffb643f36f83be8104b2d8169a4641bc733ec2. 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/TWL051400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa2ddf468c94a32e3ebe2014c9310b29fbab250de30f55f307a162abd9c0469. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TWL051400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e0dd114a817910ced261bcb9bad325649d28ecc8e662b3660eedcdc437510. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TWL051400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058f20f39b6cb14a6e0a874f309f2a4d1ff0b6505780687a25cd160a3253bc79. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:52:16Z), 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/TWL051400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744e55cf0df62fd9d60c41a17aaa1473f5d7c0a6fe4f9456c53c336097fe2b75. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWL051500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0693023395e3855d7fdec0dda8f9cf76f06fb56aa3ffd731585e7b7aa57fd875. 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/TWL051500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c250f980fcf5d32693ce8304e82748de722a964145fb007490b2ce17035c270. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWL051500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638f602d89fb0dd2565e991a8c76042eefa14a7d542213514a03b3b0faad679. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TWCO11700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75bc395c3d1783d4615a418d6b20f6a4c4bceeb9640c8e0b23f767773240f03. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/TWCO11700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f497e9f08f670b49295cd1fa5afa20406ca3813163d9b69026155f39159426c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TWCO11700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28f1d7342aef164fdc284f639361848fbcf4ce0212cd4a8e3d406f99dd69667. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWCO11700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c01a765a6a7e89622d508315b1752ca555aeedc620e37df4e2c1e25308638. 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/TWCO11700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f5a5650ad46d2caa46a42ae590d472d0a2dc4d2a5e195487446c5dc6da0348. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TWCO11700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363f49f90e69d521270d57690f75c24579b958b520cd00417714c54609fba019. 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/TWCO11900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f291f513aa979f2ca3da8f6d86d251896967fbccacd41cee77f19513d80f04. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TWCO11900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c76d34ddc5c65c4b5e72e3e5f69c7b2814c1fba5397bd3ffd69c6b0bde85eb. 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/TWCO12000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7ad711609cd63eb0a922235e4103cf2664c4726f61db9459b9db0f9e85079d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TWCO12000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f3378e50df477f3080b2588d66af9e571451731c8fa643744f118fdca75cc7. 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/TWCO12000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3842380245abf7fed16b0e5b90fea2d18bb3b160440b239459d0b6b99df83ecd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TWCO12000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811cb46206365301dec00c6a0bf1475038ebcc4f9afeff95e873452145ff93c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TWCO12000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a71bf889c42976442922c62e23d24613bb4cf9c9616448af52eb5095fe4e37. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:58:46Z), 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/TWCO12000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706d7e5ee69d415ca9811ddb06fb582bea328a3e7af35575f699c9ad8f63980a. 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/TWCO12000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c1b3388634487d03df1cd4e580f94f34d0195595dda385151dd5565e9bd7d7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TWCO12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20276e28ad5f99c61ad0950fe5639d82a73d2c63ad8b11a20aa8b80d04af0509. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TWCO12200022.