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 0x94ae94231ebbdae9770afbbfef65c1102adc64650aca7ec266e2a960cf766bd0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e4bf169-ebdc-4f87-9ede-13d57ac2123c.json and https://artists.proofprofile.net/proofs/artist/1e4bf169-ebdc-4f87-9ede-13d57ac2123c.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 0x5e8298af98deacfc83045a626b85aeeaa8e6500fdf1030ffe5b6080483d97716. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCADB1702749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231a53c8d9c05bce413bf0659de7e84ac0eb51def1be96bcd0b984d50c886b1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAES2012706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb672adb1a5e471681aa788c35be57904f8ca7ad311bb759e11c5f5b6e8077a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAFA2001501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8496d5741798c005c7f88cc5b34c814097333afc0f17d83da154514b62e2927. 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/TRUM72100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff0394735e899e53a4fe42eabd457591f564247c6e410cacc55e790d32d0808. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TRUM72100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dba5177d341f161fdb04ba68a62cf0e0cdb4105ccb4fefe36dc3f8167942f2. 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/TRUM72100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b5af202c38474a57fe7bde83513c7696978c6c7a71bff3b956994a45f9faec. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TRUM72200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784cdb9a190bcbf28689bcaace726561b4820e79ff45ffcb612848fc00a11e85. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGF2220013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa7a3221d58f9f5a573c565ee1f6e03c3c94f00b66eb6742bf2f9d1803943a1. 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/TR0012200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7fab835ea60393dca2f006bf3fcddea726993ca1bd2eeba0d02ee65caf70b. 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/TR0012200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6665b770f49967e7d1c1c33d0b923477d9482e68507dfca17f7797bd64dd92a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAGS2218796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07873350b79c44fb63943cf3e2d8ee84f8add85ec9d02bca0c45df4b234700a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QM6MZ2369244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d48f33802c2a088a2f7d9a81e02d79e2f91d4d225f2c3fe3de47a2151c67b3f. 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/TRAHZ2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73b9c806c2ca1101339ced51a5ed478bcf43e5708d523b1798ab0f745f4da52. 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/TCAIM2444286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7865abf10a6050724ff5accd23b018ef2ecb3ef310e68306301484344e61f2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TRBDY2569006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d09e38957203d23c126599807cbedf6572d375c9bb4d0c5cc6a4e18173dd129. 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/FRX872239569.