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 0x46e919cd688e3fb27d1b86758190f1b32b01e02a53db89cb51689a9d33738d71. 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/f31a8186-ef10-4e95-8c8c-64c441e66fb1.json and https://artists.proofprofile.net/proofs/artist/f31a8186-ef10-4e95-8c8c-64c441e66fb1.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 0x0c107091258b92035ecfb3b2a525075275a5b46b3bb636b1cc628671c75d8431. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX281965818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb40e248f443340a7ecb2eed3d290e2d63ebdd37dc2224f1644a7bb146bd733. 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/FRX281965819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe856f5593dcf5676126a9aa6aac4cb55a6b5e6803e0d4bb7327ccec9008a4071. 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/FRX281965821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72baae863fc479a14b0d628a0262b371e8efbb384e5dd65a65c42f43c45e47cf. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FRX281965805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf093e351c1bd36565689bb87d05000a22b99c804f6b4eee775dd34e1b412dbe. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX281965806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082305bb8775089dac70d4b4d21bd5cadce41e933c5f8b65f7fd635beda77b71. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FRX281965812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884233afae8a406142dd58162d0fd5e578d35b61cc0e5f87b77bf49351d25a0. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/FR10S2026523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffe234d83f574960d08808605a2a3d4fb1897b506848efd888bd3006f92927e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX281965795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd0c07c93e6339a3ec32bebd6a257702b5b1a29da65961481ea874613aab76. 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/FRX281969615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe010284223010a28622fcd7fbb2ea49fe541abdd99dae5837920114de69e4983. 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/FRX281969616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a68a7393db71541ee0b659d0e263ea8a0d79cf185301633fd57ee89e007d681. 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/FRX281969618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fcbff430493f8f4966514eb838e56724ac9e9d0a64ae312f3b1900b4e952a2. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/FRX281969619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d94f25a86750293c9f8e1480351535b85f0dcfe885cc609fa8801b7a01449. 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/SE6SA2228537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58847d407c5afa87534c54dd0d4f796206a2513a6a4efeb5a825ddc9c0ee860b. 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/SE6SA2202465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2884e36fcae41a96f4ed1f97842753d4c12d5cfdd8d78a80b667570fcab055fb. 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/SE6SA2228540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3049d5c9070be2e8f5ab36a734ba08794c37b841702eed8aa0abba72bef58097. 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/FRX871514832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5621a718b045b69f153e67c18e82cd16450357da61177676c639d8e8417f0d65. 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/FRX871510755.