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 0xf85167f1142176d61dd188ffafcf8237aaed4eead66f738ae53dfc1cba958291. 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/7769679d-e639-4c24-b54d-3a4591c1b99c.json and https://artists.proofprofile.net/proofs/artist/7769679d-e639-4c24-b54d-3a4591c1b99c.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 0xb97cb74abd64eee7daf43eb5cce2c6d4018b8a3bc3a89ee37906ec2961a0d005. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/RUA591700867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2bc19373726a40d68d99041173c151f6672000d20e6948e58f5dfbb3701d30. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADK1778367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d24b3d603610b4b9c11bab7d61caf346529c8d8a50d8fca2b7ac54a46631b7b. 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/TCADS1822834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9f059a450892904370297e856c376a2c13f60b41713cfc4fb4c01d8c620617. 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/QM7281822628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c18094385c0a3b056aaeb9bfa4ecd95b97c4dbb90043643896e4127e059d8c3. 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/QM6MZ1967871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8f13864d02960d7840fa0c5341558946da6d362b052befc0c995bebd4035a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/RUA582103330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b127060a1c375af91f6113380c962ab1d8547180a7f609a1edb307461e0cc1d. 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/RUA582103332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab58be4596e8b5d80dd2d166104fb0dd5cc168bf3a159b60cc2ccc214a208ae. 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/RUA582103333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab029ea8f11c16f7033a450eea7ab4b1c9b92c7095777f4f5e585fc9d6f804d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/RUA582103334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9d91a4bee79f3d1d8523c313ca5108dbdf1d77220552f29038923619ee6811. 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/RUA582103335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b007b765a28f64e9da082450d48aed978f4cefa6324b31014bff15f293531b9. 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/RUA582103336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33a7ec021d7013c78bd3c0134183b84229559e50943906aa9254373b2c6010e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUA582103768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da5be89a072ade71fe776c98e0c0ad33aedb73fecabfd9dd0eb40a6f1719805. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/RUA582104064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410cae46a31e594bec44c63c9bac2a479c39768a8d4be66b549847c78bcd9892. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/RUA012000722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4bc24a4cb40892f02964813b0ace94c6e2a611b28d4a1266a1336751786cdf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/RUA012000865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b209a7eb53e06d7b91d58fc96057bb6b64e58947ceee8bbb87713c5c4de2fd. 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/RUB422100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1860ae3e41fad180c0818ae52a88d5ed287c2074a3b6af5760201cb43ff966cf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/RUB422100563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210f4f5604910a778138f7ab2f9926f5594b4aebf68306e344f850fd8e850bd5. 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/RUA012100712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d57344b6599d9140dd004fb1509724d0c8a59391d21ea7596a4d0a2898f428. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QMDA62163245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca34bc7389a31beb1f9dd5f88b17682d4ee65897a21568c1b740fff5f1422e7c. 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/QMDA62163247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95093a7dc19e131fafa97cfc89471d066952a81583f3bb0ca770546506b3c6a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMDA62163257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39e4638890ca0b67e54fa92729460d5237e0e2e42234e58540b48c7e83c579a. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QMDA72182548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989766f476330d7e06b75e30ce77c3e17778b5ac4d33269a3c449db4b7784284. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/RUAGT2334302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc11a03bc09518ee2a423e71241c1eb7be99c234bb36160aa543b8a75067bd. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/RUAGT2334304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1633c03cb304c9b96521ad92dd02c7814ddfc1eecbaf7afc48eaf24005c6181. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/RUAGT2343900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef6a3fc050f16ff0db35456b15deb6c3ac79234e2a7006f9f2ddbc1e2285cdf. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/RUAGW2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6fcbb1a018c4ffbaa4f0ea59a374879bbe7a0a805f2891c8193e857c4abb39. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA052271425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe908bd3f8b58d72165a38c1610083af9893e12b7355dfe1d5fc19675292e00. 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/RUAGT2465778.