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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec89e7f025589e3e2c3de539b240bc0dfa35b5c608c840d65c495482b22c786. 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/95e073c7-8d8f-49dc-9b22-dc7e226f5860.json and https://artists.proofprofile.net/proofs/artist/95e073c7-8d8f-49dc-9b22-dc7e226f5860.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e65a885207c04476fba52aba2790f359d3ecc6baca6e4afeee4b32a72b2d30. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES61831792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8717994567cd88440a789c7187b166890e8efa623f9d6af624d57ccca5bda. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:04Z), 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/AUMEV2235413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf850b37c0e11555ea96e2733ec4d1af16a427a22c5a00ffaf9ecc007146384. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUMEV2240055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc019d1dcba1d86f9fdcbe0d28d4839e80d15210d0950321ca62987497f9e81. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUMEV2250779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f91fc994faa84eb7d515a67288cdbc36eb0e3064df03187531d3b528fd5ca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AUMEV2266621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66b3e9f35e758e3f3737bbb85a3d665bacb024bb21c2d2f56c291b5fe9edb9. 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/AUMEV2341909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffadf3f41f2cffec4db45110d46423514b98df89813d6646c4550506bf9758de. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAQOI2413366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9364d733fa788de97d8c1700ed83f28fb4405e227094fbdd49d4418596f36a4d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FXQ892200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3f6227c532adc5d703924cccd433d6209ce91e731d0df3f3a48f732fa0c017. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FXQ892200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b4d58dd3723e33f1fe6db34f48232e93f705bc840549523850f36dfb9751a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN31962765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c6d73af96e19867e558354654ea82305bc19651c1d075559975b1f336cabf5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ9ND2211180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f794d5e260e11ecf8286adfacef905d8a1fc3435864b345f0967d4acb880aad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FXQ892400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd3c2efd640eb36db9a02ee39d934044c7857e7fdac6555fe528fc8ad8985b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FXQ892400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfeafc1126534ba4465580f9632a309a9e8c59ce22efd6b8c66be222479a442. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AU2DY2200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfeafc1126534ba4465580f9632a309a9e8c59ce22efd6b8c66be222479a442. 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/AU2DY2200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3e08ab48423c17c3cf213a163c1e43dd181336c43a5b90b8d588729a5e0cd. 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/AUMEV2328095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c002bfbd503475a863444bda213366c94df06b658165eed95acd6ae6dd781. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FXQ892200416.
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