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 0x867201e6e31de87efb31ed9f728f9a1bbb89b73ba05888259da4a3ed35bdd03d. 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/fbd01eee-9d15-469b-88b6-1ccbfc9e826d.json and https://artists.proofprofile.net/proofs/artist/fbd01eee-9d15-469b-88b6-1ccbfc9e826d.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 0x0bfe1c90a2fd7b12e0d4350b93f3244bcab091f0a17f05c865919905a9415a07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEP2176785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395a602a2256631975cf0567575955a10ecb2b7f737257549684a99d3c9e3d4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES81867149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025e3623452410a50347685c416c2a82bf7d6adfeeed45465e133f0a6fa1a1b7. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZES81867151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86644f648d4aa579aa262c54edb443755822c61c8daee877e474372132cdca3. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES81867153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda3e6f686d35a5206a7798179b652c2854db289a1e8b69170bc6bcd7ca3bc4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ4JJ1970240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05d5318e7fb5e979cd705bd46163640877ea39bb80c507d2ced2514935a628c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN51980463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcbf47e8020d347b0726326bacabc3b35f1ebda41bdfaae2f7c98f592999315. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:49Z), 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/QZK6P1918322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ea5f398cf249cad6cd64a23a1459fe233d3dcdd8c94943585fdad00f859a91. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZK6N2021583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09276c33a78e59456e67e7dd2e2d6476dca176c6fd210ca8baf35af699e14fc5. 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/USHM22116465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca5d52839383e30e475eda2d91e0fa6214d88c5d6af5924b5309c43ef7a4c19. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USHM22116469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e35f62d2049a047012bd94e456e42c246ee7c3035ef9ddae69ec7e3d97b23. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:11:24Z), 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/USHM22116463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355c07e3ce7f918a578f1967efc27e81dde7132c0481d6da5c8b35fadbbcb0f. 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/USHM22116464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3208e898f151b18297607eca64972482cca7cde178f5c66d240fb9e5b72ed20e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES92374269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb063a75450a01a38118d1885b47cca88ddea0e794e70433e9ac88913b21ca01. 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/QZTBD2339167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfd1ebe8799fd384df5d780c5af48cd42d061a1e56bc025b5e808ee3f2b628a. 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/QZK6N2454453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bebc4f6658c0218dd0b93dad2887ce4d3686c78070b08a08bf4f1e3a033a73. 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/QZZ782568499.