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 0x6209133632c76c888dc190f24fb08033e21ad81104e2f1c416c88dc9130e940e. 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/46a5a541-b7ea-45ba-b24d-416453744f76.json and https://artists.proofprofile.net/proofs/artist/46a5a541-b7ea-45ba-b24d-416453744f76.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 0x4535eff0c189ea7365ba5e8043aecb11d34229bbd555483e298d7bbda8e517ae. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QM24S1916738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512f133c0e0729ff6f6f2d1e6cf4a3b7f8ea4c3eb97261d03c180787e2ade054. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/US3DF1981286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6485838b9aaf25a3446fb6d203849c71be4b6bd8e6d9180651018cc5bc31bc41. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USANG1903810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb4400ec5b30c0d9ab205ee4e7b800ecc0e51b9513a014915e2d267d8e1bed. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:23Z), 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/USANG1903811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b15bfac4efba5596cb72a144e6cf65d523a8a6362b1d89b8bc937d1b4367be1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:47:32Z), 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/USANG1921220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0b6330e57de6d59ea3de6aee3bd6e43c1e6ee024cb0027cd1ceceb57cd2952. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG1921332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60da6708659267caaea9067ffc1983bd505dabef3b33420eb741ad7bb8f23ad1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:53Z), 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/USANG2010266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8839229c01e981fc922a38df57d733686777c4a16e0d9364b640acf25a9b67. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZDA42113189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307872c10fbeae53f3eb6fed4812970023ed86f477d14491ccb194c90a0a38b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM3DF2149631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d218472ee038565bcbba5b216e09125ec3c3841bebcf30ff7634166be6d3a2c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/US3DF2207851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd680ee9e016d6e7f1da8b82e8bfa0ca1b0d5304b44c761a12e7ec462e3ad6e1b. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/US3DF2230518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c4847debf268700444680ccb0f3d1ac22657d6ab9e442c0831eb4984d8fabf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USANG2278864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1339e6eb1d603893299d42b53825cbb758a5cefee6e6def8e11d6c09c5b64e54. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USANG2201507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9bd1fcf3d010f469c129e587875787e1c5262e679368bf9428675bb20e1f32. 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/USANG2201424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8aea282c7a898925dee33d008952359456aa0065164aa5fbf8ab0776757e9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM3DF2201718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a11bbd2de376cd496758ce2b15f166ac291f88a4c14e0decf5bb374843b709. 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/QM3DF2201717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f14a78e1c4901a7db7cf9b7ea33bcadca1cd0dc2f04ede2cbdc014eb9d230cc. 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/QM3DF2201713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ba9f2fb4bc702903f60dacf8089f04688b7476af6ba6850d528aa0b8fb421. 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/UKZGC2304641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7389e3ef571e43d57d49296201580363dd6596cfdc48d7e132f7d953c44160. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM3DF2244386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f891a718d5b840372ed9e1d7808f92b1abc137f8e144b292d8f7aa8988d9e72. 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/QMANG2215310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6d4b6d7be324af9b3c8a8863facf4c512b6f06fbb04155d154ff36acae1224. 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/QMANG2215321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff18a92e2c7b2fd8ac016c69af4730e1c3074fedd2a1accab76e4561138a65. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMANG2215314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6d4b6d7be324af9b3c8a8863facf4c512b6f06fbb04155d154ff36acae1224. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMANG2215321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df09d7549cada424773908441f5bfc5f120034ebdbaece1c2623cfd8c1b88da. 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/QM3DF2159436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2437562ebab660b2d6067087034628407593828a5a2a1507e276fe2312d994f. 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/USANG1925106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc6eae93ac558fd43e820ed088080a62b2f75baec4d7b7bc4c3c2310e33cc5. 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/ITEJ92100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f527847e0323ed5d700feb73e8f6d3d5365b5f183e96a42b1c781b9c7d247b. 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/UKZGC2303307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2323b1b64f02b12071a601147b026bc9141bc469a6d7742827190327bc9a4b2a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USANG2057924.
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