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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc028e554181a981ab185eeb301cbdeb7e942c08551a546408796f80719437f7. 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/8b8bc98d-9183-40d2-8c98-95e688900512.json and https://artists.proofprofile.net/proofs/artist/8b8bc98d-9183-40d2-8c98-95e688900512.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82603001c579a1d3efdf42685e87f4a156bb571579db1aebbd46e597723020cf. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/SE6QE2217241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882f37815fbe15834df904d3b23b9bbaeaf874672e87aeb88627b9cb1d3826d2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/SE6QE2217242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee40ac3ba479595e0a959b4ea858f601f630eb44e11cc75d05c1e8cf0a113c3. 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/SE6QE2217244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726d8832a0124b24c5cfd47e0673ef6e1477cac902fc1f18f2d599c9a3f26bb9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE6QE2217245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8e3ffb2b8b50d352f3bfc99504c50afad58664495b0cfe37da2abc2144fd83. 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/SE6QE2217246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69dfe9dc3505114ff671da7c91082b975cb3dbfb1e3ca7923d12213bd8ced73. 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/SE6QE2217248.
Medley (Brainiac Maniac, Ultimate Battle, Cerebrawl, Loonboon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bdcc954a7cf0794b2ee6e5d7e53f5ab6b9d896b3d7b99372098bed52eafd4c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6QE2217249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83107d95806b64c53673ae8fadc6adbeb2f1d2dbe758b6e3090ef930ba3d58e0. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/SE6QE2217250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ce39f5a006e4e9e134e87527fb287d7c9037864e9a17f82e5885b08929a4d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/SE5752390991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9fd759a17ddd1ce078987ef88f1169beeb05e220e6f7859c24f1bf7fe3fd7. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/SE5752390992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9238bff197ecf228cfb4044844bf207a015da9ec30e723814102cf6fc05b74e6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SE5752390993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129575e702b591de3e593a6ce93ab8af517c467f87cd627dd805934118980be1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/SE5752390994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a33a198f913228b7db453d7a15d701617d69b6ae4bc4e67b2c35e210395fc1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SE6XW2361960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2122c07e584ccf1502a86ddc9e6aa221417bd5ccfa926a25e72527686822c7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE6TI2320421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f815f7d667f65ce15a9d14ef94b17033cee7c5ac7f5dd83ef417ed0d61196d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6QE2217247.