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 0x52bb0feeb528dfcd0d3886ba2e4f233fa79e8699586444aae26a167ebcb0009c. 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/e6ae61b9-32ca-4183-b0b9-9a300ca6a8f0.json and https://artists.proofprofile.net/proofs/artist/e6ae61b9-32ca-4183-b0b9-9a300ca6a8f0.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 0x35a1f09b631e10caccce847390aad13eb4f4e154e113c874244f0b5295c80499. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TRCLH2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24705679a2835b05f9f487bb528e28f2648ea56cc7d1b85f978be24dec8b7122. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TRCLH2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e61bed7378e87cba19bfc193580721509187121d39dece5900887999ca4ce7. 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/TRCLH2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699e03e1bb21eaa1c8369989fa8c19bc44e0579d45637cc7623bb857ef1fbaad. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TRCLH2400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9108eee957ad5baf3cb4f0d247f4ed758884c116adec20e645b0e8664fcbf7. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TRCLH2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06076820185fbdda0fa62c6774e93e4c854c422f65e533993b6f321f21f3cb0a. 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/TRCLH2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d0374e43c9bf84ce0b66fadd7769eee24e9665b1de0614486a16d57e930430. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRCLH2400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e811806b7a483b45e7bf5a0e792c7da1e1577139a7046b9cd998b202d64da. 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/TRCLH2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d40188a741a7b42ba0bef769cb50cddb2406f3cf3741684f69c8588a47328. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TRCLH2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b99fad674420e69f654df47498614556cc0925619950dbd159ec74ed8fd14. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TRCLH2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25e2ae79ca4d986c1b17f6c9b47e67613cd2dd8b80bd57630bf5177849473a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TRCLH2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1205226eef19b3dbf713dc980c849c8e119a1213268b84447bab57114228034e. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TRCLH2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4badbad8be31258af74e7019b9fd90af65d6722a0cb3b00dfd27e0a83838241. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TRCLH2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4badbad8be31258af74e7019b9fd90af65d6722a0cb3b00dfd27e0a83838241. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TRCLH2400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271613764d8139c80dd35ad6984a5bff9c56ca79f1ed4235006bc617cdb7439. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TRCLH2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6271613764d8139c80dd35ad6984a5bff9c56ca79f1ed4235006bc617cdb7439. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TRCLH2400215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f7849beea323b879866e45b334eeb9ad7d4ef6f817a353549ca26cb7b089f0. 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/TRCLH2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f7849beea323b879866e45b334eeb9ad7d4ef6f817a353549ca26cb7b089f0. 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/TRCLH2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c114b2e9b3df2e7f9e4a96272e144210eca3cb844b7c8b13804211724f2ae8f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TRCLH2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c114b2e9b3df2e7f9e4a96272e144210eca3cb844b7c8b13804211724f2ae8f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TRCLH2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476e2d3f2eec1aeca82193a5e2c7462a43a960c744ad91ade9706be835ff7b2c. 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/TRCLH2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce35dd2d1bc9290ac7c58a6921821c4fae3fcabd060b8820d4dc03e05642f16. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TRCLH2500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7de2dd2afdbb2602afb10294586f32e5589fbd915c14c0e442f3ab87759c1e. 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/TRCLH2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7de2dd2afdbb2602afb10294586f32e5589fbd915c14c0e442f3ab87759c1e. 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/TRCLH2500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56b5c89477fecfe87d38e3d84348867edccc2f313ba69e20a2eccb0a0a13837. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TRCLH2500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03847b964c0897f7afd4d534f4d49987916f1e19ee748864871be8ac1e1484b6. 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/TRCLH2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03847b964c0897f7afd4d534f4d49987916f1e19ee748864871be8ac1e1484b6. 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/TRCLH2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916affadede43214c12ba0348c9f5eaf4b502bdf412d142a9d0e9aa7436bf907. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TRCLH2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916affadede43214c12ba0348c9f5eaf4b502bdf412d142a9d0e9aa7436bf907. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TRCLH2500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f0a2e838623260fc0c9890c0c74e8a2cf84d1790f81e2241087a047123ff8. 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/TRCLH2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc69f00294f44f03b0e7e3ee7ea7b99aa660c00478c23905e19a1d4c480410e3. 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/TRCLH2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc69f00294f44f03b0e7e3ee7ea7b99aa660c00478c23905e19a1d4c480410e3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TRCLH2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261a83b2810dc45ff2b06afc8f05b3c966dbb1c6b82d47572604ad7b5c530e0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TRCLH2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefecfe51b99d270541d5ec1b25c18c310deee5f4d7861d2fe374b14c904f926. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TRCLH2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a27e3aaf37b1b4073e622e6d328d1346a0d411a10552c45871e338019716489. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TRCLH2500094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454f87ddbb209230a0d4cf57c6beae27f962102d7ba992cf4aa0540adf7e156b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/TRCLH2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e6bae5e8f15972424173741a909b09f1e2efa1f0e3f83b704d7895a4031cef. 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/TRCLH2500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d18cc48299a4417ac222943a657f64e3cec35a57c78e05b30ad29325fdad9b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TRCLH2500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d27df5569af4d7d880ca4b9f73282a88cd07687537690cafe83464b2cd43da. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TRCLH2500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29811b078737daff1954584eb9822e0701207dc7801788ac34697a55189b8ccd. 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/TRCLH2500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49527a609d6935b980b93ba92c44f7c858d3331f4ce18b2c870799cdc5465c18. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TRCLH2500190.