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 0xd9d0f67dc4604eb27b86d6726407519f7f3835fafe74a041e99216b0c808aa39. 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/5cf90c28-1857-4d5c-b82f-fde406a4a273.json and https://artists.proofprofile.net/proofs/artist/5cf90c28-1857-4d5c-b82f-fde406a4a273.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 0x101d0826584bb160f1769fcd64cf89d493a7ecbb8fc3edbc20a3ddde68c4c507. 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/GB8KE2156267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e923c2845169e8a9e4e429c3066f8fe15a9e1c0675fdc2659a692fb993a100. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2472489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8162b4a34d3afcbeec59079fd32498cf62b190018b4f529de461110cb7e8737d. 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/GBKQU2435621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e0ec1d8997cfa25992f7164b0b9f201133beeac8cb14ba08ff850a87851753. 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/GBKQU2435612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e66e283be88d2d5f5b546f0af965a13e5217c817799ee16dbb9c7f5326d034e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAUM82300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2bfe8677fd29727bc9497165cdbb046ea7cf9815c1c7074c29f144d39007e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAUM82300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50063bc77231dba89fbf84f510f68406a500cf1ee0f08d8635b5ac05bd2a1254. 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/GBKQU2362877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e759ac0d39c40fcaeef5871ef8856b688c2c58524767e75ffe2c7f568f251d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2362878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dfd3cba4cb21a646f9755b1d9c40642f9690f0b8da36c5070547eb1b4ba8a2. 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/GBKQU2362879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dbf1994c1283314bae524bbe89271d7f0226a94593ab531b83cfb8b5f14918. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2350841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c7cb4a00ffb4fb6c4a43c7a9ec4d24ab5f19f3f7bef55c8a2c312a6b70811f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2350842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc522deff53e7bff849b9c32e4361c33b86810779c2c11409ca32fe6fd08c157b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2201593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d1d730c25f50a7b19bae2100c346d6d485bf5acc1913e4e6af8b1eeeec3a2e. 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/GBKQU2198528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a497a809441aecf5f2fceb1849d51fa4bc67ff6c8d5ebd3f8bbaba685bc09d0. 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/UKCL82000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818b47247b51347c5f2d29c79343bb8bb070a9c2faeb42568e913ac32a6f850e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1916350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f5829471d9e9f1466ee32465e11825e025c11b4334e9577c54ca1ec22de09c. 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/USA2P1916352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23d53cafa944fff87b980042f568b7c2bf179120e31be81cd7e98b5df563ced. 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/UKCL81800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f46e006377f45e264f03cf29be3f5ddcb23d2ecf43ba7448c02ef95919738b5. 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/UKCL81800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f5f4d2a4fb603685fd76b0d5158fe8d1c678f9437fb8d622ee2c5c9be62e30. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USQY51766679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38b03c7a6e1e15b84c0b2af0d8ffdce8b5d4d5cf240fd1cb1f5c9822a3d0b04. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2419853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc05ae23726be4829224b55dda38599b7a1515332a1829acea85f4e7435ba62. 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/QZ5FN2419887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57addab15cb86d736ec092d126e887794734e74537b1ee1a308f831d52965dc6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2419889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a56216a2d8bf11ff98776bd565fcda9ce0bc8e55b3da4870fa1eb99dfdf9f19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5FN2419890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f7b5869e33fd81a7dfa6808ae5b3b15ced9905f0a6c53c3a601cfa131c830. 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/QZ5FN2419891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90f8264ce7dc7c0ce2971973e674afc272d0587a018cfe32e76352e6ba480e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2419894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2b2948db18e18f47b43201a926f44a896d8905aeda7723cc9e9a65d3c2f170. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1700380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01df813628fd56ccbb4eac55172b74c2eb7aa69de749cd28e538b8ff5541918. 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/USA2P1700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51da38ded529b3cd5512aa5f5202534f3de4430cc1e07add7bea473a0d5b7553. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3d0bd7fcc0705e7003b275c327c8a11497623314c4175f0323709ab546dd89. 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/NZDD11600006.
Deep Dark & Dangerous Trilogy, Pt. 1: Deep