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 0x2a6983b25cd2b31296181ff1f5ef809a28a8045de1b867d7e980d3c2b538c246. 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/2c4adab4-cefd-490c-a7b7-b1b0c8e25bb5.json and https://artists.proofprofile.net/proofs/artist/2c4adab4-cefd-490c-a7b7-b1b0c8e25bb5.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 0x3f6de54135adde1f4eeb73e07c5aba3ac6d35b4168a2dd0e4b8d7afd19f7f465. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/TCAES2094989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c44774f31d0969ed21359d328fa2a91e443943c1278ccfcb07541cf976f00b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFM2100473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6884eb82dcb2de76d744d30e269a95997270e417e23eaf6adba58cd82ea81c6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFM2100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2974b9dc74dc02a4e6ab9ced88ae00436d52d446132bd09b7fba72b27c180110. 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/TCAFM2100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d919e4c542730991b4669873afd6d622e82f6e8af20aea85281b9cafc698ff. 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/TCAFM2100483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf4b0608718819fdc634377febb09481511c4c7f0554f8dc319066cd1a7648. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFM2100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f82b6cded0d04d24455c1c2bf921f8b2d01e423e364bdfb0b05ea3ce9b90080. 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/TCAFX2183810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87956ea015d3a8256f5d2f87111b9dbcb66a608938cc9f46aa3c0e31c58cfb1e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHN82269934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694ca6ab6f3c9212d74622e399df934c2b91312385b5a13cb1c3d8775a2b58f7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAW2268366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9e160582d9f79cfa9281e2b8c114d3da32f2f7c099e81a90fad390a3b15296. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB92253879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e21e6ce8808e01eeb3c452bfe34761e0b3a1170a85f9e87db982cfa98b893d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NL3GQ2100453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76a46c02c54fb258a77ed5a419d6d37a537774bc39f987a0d33837f475815d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL3GQ2100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3288e8814bc1cd081bce3f77ce841018e8b8e79048ff69de3b41596b97341b3b. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/NL3GQ2100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e98d256f610c553f2f9c79562f7fef70dadd56e0a1880e60ab9af575c9f39ae. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/NL3GQ2100608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013d7e2d37d32f00982f9d5e3391ce69bdbbfc38bd62b964a55dd2c2239f1cc2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/NL3GQ2100628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495eca335cf9c7f1cdb9231541d661c8623bdc89c5dc2501a0a39166219c5f3a. 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/NL3GQ2100631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdcd26797b95de252cdb2f439592e3e149253b18243c3c284dc30fa98b6bbc0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NL3GQ2100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d595c20777fda3e5d2a56d1e69d90d1f171a095d36714762768de869516b1b0. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/US38Y2548768.