thumb|right|250px|Stripe-tailed goanna (Varanus caudolineatus) A goanna is any one of several species of lizard of the genus Varanus found in Australia and Southeast Asia. Around 70 species of Varanu
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 0x93a609b39649555bb2051d4d36e028e9145bf950476797b434e26124174c6fb3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/485cbabb-c163-4197-b141-faeda4969b7d.json and https://artists.proofprofile.net/proofs/artist/485cbabb-c163-4197-b141-faeda4969b7d.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 0x03fe8ff307d6e9c585abce93a8c3904496b02c65512f764f4f089daa4d17a45c. 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/AUWA81700044.
Spirit Of Place (40th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71722f6b681b4eb9925043461d42bf2b3170ec25a00d1288ca55842e34940e5d. 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/AUWA00209160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f960811a1261ec6867bb2841b94414f406987818d680e33812bb5890e6f12. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/AUWA00209170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8ad887150f2bfd9b0a9ed59b458e008a76b6d1b1009f8cd91d4fa5fad8f421. 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/AUWA82200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8e568055c97fe03284bfb9b233bf898c8497a72e2b81215479770e982c75ae. 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/AUVGO8500303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069047ae707aee70c8f7bd030ef1e296e98bf84bdf175cdd88f5eeb39aab077c. 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/AUVGO8500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11870f099b35ed3b0333a230c4f0490d74acad153f8de902149f5e5aebd8a696. 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/AUVGO9800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745ea72c7ed0ee4f1df90e63b6a94b63cda078708ccc2d8c21d8eaa12439bb0. 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/AUVGO9800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf13e1e506ad6ad2ca94d9502ab4d7e17ea06343fbb38d83e725afb2672a41. 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/AUVGO8500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8352ad16e2e78b66706306f3ff232c4879889c61cbbaa86ac448daf0cbb8bda. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/AUVGO8500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a79dde3b47a315caed5db776a8e833842f6fd303492137ccc2b7993904b3abb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/AUVGO2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675385b4a731f487dcf8954dd1f6907c9ad138835a11c3c818562251a143c523. 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/AUWA02300017.
Solid Rock (feat. William Barton) [Extended Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e3c8f9a3885cc9317425604e1c80472b747c6393c80b74b97a5231d74ce484. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUVGO2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71722f6b681b4eb9925043461d42bf2b3170ec25a00d1288ca55842e34940e5d. 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/AUWA00209160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71722f6b681b4eb9925043461d42bf2b3170ec25a00d1288ca55842e34940e5d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/AUWA00209160.