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 0xd44f0b3a943c981ac948752a7ccf5f44c2cefc80ed712dc931aceb2ccaa5dffc. 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/1a8245ca-cf1a-4800-8494-72fef2fa57fc.json and https://artists.proofprofile.net/proofs/artist/1a8245ca-cf1a-4800-8494-72fef2fa57fc.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 0xe846b2aa383365de3ed7f3622039b0ac963e470948097e7e6eb6e97a09ac6893. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/SE5Q52200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ca12f54dd7dff2378b32073838184f91b5ee2b1bd2582c47b83b9b5d0ba9dc. 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/SE5Q52202582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4190b6cc5f8afb24c78478280f42304b028e006e6f825a08eaf003d78d737617. 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/SE5Q52203471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863834d92a7856f6919f2c0e65740ba02760120ab2cabd89786d304aa5a583a6. 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/SE5Q52203469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ca12f54dd7dff2378b32073838184f91b5ee2b1bd2582c47b83b9b5d0ba9dc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SE5Q52202582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0925c4f120aa6b5bf4d471a63b4e750956aa24eba8f5a68d3afa6bedfbc9534b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/SE5Q52202275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffba67fdc310064b8799fc154e6ac73717398151d6371059313d2844ba291048. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/SE5Q52201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18783b79b3d1a38e11fcf471c5a834f6a30aef393f4946cd01e0629ac6415639. 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/SE5Q52300479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863834d92a7856f6919f2c0e65740ba02760120ab2cabd89786d304aa5a583a6. 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/SE5Q52203469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde328dc4b338bdf0f7d6269100553496308530f8e3c5cc2f658d0a781a78d6b7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE5Q52301509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132549bb06babf1d2b54ef1be67c564e90e31313c06d178b56d6969a972fa78. 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/SE5Q52303348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5c9a228a3862d1c79978a5140dcb57d47bedec5a2aa1a02cfd66ce4ee6f88. 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/SE5Q52303452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfbbfb85f10d3e55184caa1d7c13a8f83a1f35171afe53069cea146e10b2a8d. 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/SE5Q52400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf295251d785c25037d977cdceae4b6bb5e841b090920fa219973c856ed38b316. 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/SE5Q52402271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb681ca5ea8e063cb77d72d8bca050df898c22d68b180a0b4a4c66016995176d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5Q52402934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ee72cc73576ced24aca3e83fe15f76292024fa7b5285a4c9bbea4c5e2521d1. 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/SE5Q52403816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedda57d400aa3814cac5b7a094cee8cf51d65909d631af0f43a4d96b4c8e389b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SE5Q52500709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3fb0f5488f28ea943f45fb38707dda3e34cb4d3bee5a91fd0f6bd23e484d31. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZFYW2182864.
past. present. future. and the gravity between them.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09971ff67128d55846c72d23a471ac817e5a71d881924de304fa36be97dd475a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHN52437688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09971ff67128d55846c72d23a471ac817e5a71d881924de304fa36be97dd475a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHN52437688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe169d5aaea4a41e78807de93611284c4b8b9d5ba5fcf4918a62180fa284de70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5Q52402003.