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 0x66d4056232ffb7c8a4df5ccd972769607f13297efe2a01ff5f151258808332de. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b75a8d7e-ed66-449d-9ec7-12f0992ff211.json and https://artists.proofprofile.net/proofs/artist/b75a8d7e-ed66-449d-9ec7-12f0992ff211.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 0x8edfe6b0b5138dc5742a75017ace92cbc5724d493d54887852a249a4c3063bcb. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ARQIW2503019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e48c86adda3685f3e8736bd25d084e4e29c9801e81c59caf69b3c77f84bc5c. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:40Z), 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/ARQIW2503021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d1888cd40e2f67fac450d23558e3d1503ebb74ecfd556823d9ee1d41937d83. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:58Z), 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/ARQIW2503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d46aa059dc910e1ce8e727fa0589505a9eec06acc2674ed104f1a5b98b941b5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:01:41Z), 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/ARQIW2503017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b3d804bf856dac3c21216fa32eb03bcaecc791811525addf1fcd6a6a4b57b3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARQIW2503022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3143336a9f68b7ba92890847426d03a9c493759152d09ffe9073415225a7d391. 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/ARQIW2503013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb760381f3604974031039dc243534e318354464144ea1ce9067312cc3db7211. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARQIW2503049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf8a85d854f631e6090adb5d2b66290b4008af29e439c59c9d528228209ed77. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:25Z), 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/ARQIW2503025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135602bfe5b82e9a70aee0cb81dda2b2677716fff35eea3281fa8876bb4ca910. 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/ARQIW2503011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb3b54a84a650636e9f7638ba5b4cebba3abe970b52d92cfa49ce73af4773a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARQIW2503027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda157731689f6562be857a17ce3a555daa4c62f987522794842bc798d7d1e485. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:31Z), 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/ARQIW2503014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe080b6df51fa9d3ebe50cc7d76d88716eef5716ce143697805de3fc60d87da2b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARQIW2503012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45073acaf03cb64b2cf126db2eb8bcc695b4847d11fe2ba8583d312f4938de03. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ARQIW2503046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a6ad900ab729d5f4426b79209af21c6d365ec02ced4e0f2a901039013e5ce9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:40Z), 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/ARQIW2503010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc016f9263c5daa5924a7f83b053b87d7a7d67b98d5b37880f25b050a3d0a8d4d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:17:45Z), 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/ARQIW2503045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcded705fa26e30a29d1b7b4f2512d33ae5b917366a26da8fd52caac33abc70. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:15:02Z), 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/ARQIW2503009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb77a8965b9a3dec9b909e55f3fcae39185823996a383518794d0027cc519e59. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ARQIW2503048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d27835b39d62f898c482f6faa577c339a7d3e345aeb1e83ff7b3cc93ee19b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:30Z), 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/ARQIW2503015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ba3ff4e7e2a1269bec7aa99ae25489571f1849334e88401db2a13e40cb94dc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:46:46Z), 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/ARQIW2503024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc915edb2694c5600807f86a9f9fb33f36593e71bcdcf957a3d093ae268ce1de. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:42:53Z), 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/ARQIW2503018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e25d4fa1de0641f0eb2d36f93cd1a249370d7ac89b6dcfb2c899505a593935e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ARQIW2503029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9641f7b4aa71064d51c1b8d3d5451f21958d3f1ff399bc89560062d2eb2c3030. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ARQIW2503026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080e8c08c7c3fc87ecfda410e176a57a4b4c117e0b863bef5b638bdd597a28cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ARQIW2503016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eea2ce537480bebd8ee842b2cb15f3bd831a9dfb59ae7967dc66bb670edf87. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:51:18Z), 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/ARQIW2503020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0b0303ba989990ea9924d1dfcf06f8651bb273f26d972811907a4eab749f41. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:44:51Z), 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/ARQIW2503023.