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 0x5177485ee3bd595204e861b3c1d1a906e80c8702786c9df1f9b5d12937c91e85. 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/38751218-cc9e-4320-81c7-7b3b874ef623.json and https://artists.proofprofile.net/proofs/artist/38751218-cc9e-4320-81c7-7b3b874ef623.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 0x4c5177a773669760ef5e3d92519619c8ad8ee4ecf40a7c73242069f7be189221. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZYFZ2327136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44006d2585b092c35799090011cba76811f0a4a863c5fe13b962443c83d60bfd. 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/QZYFZ2327138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4411f64b72dc163fe25aab46ab1619b71ac13ed96e7fa9cbc88087bf0cee9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZYFZ2327141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a3a12dd4aad849b1dbdbf3b021454d8ce4564d92a4a2b6e7609c5ddc7449a8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYFZ2327146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6eff86830dc28c19df55cb6668731fab29bfcd6f9a25eba23d9d706b84627. 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/QZYFZ2327152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca94e949b58978b262e572ab95b0ba2570f076ebad6e5ca53ee02ef6e9f933e. 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/QZYFZ2355676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b420a88fd511204d2de63691b5c9dc1bcc48779f97003a455b920a761920f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZYFZ2355697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419184ae582de5eb50ee8056ce3538d72681e5a1297127d159e3094c5afb5d34. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZYFZ2355854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6a2327ea638ee706e829bcd4b9217182c92f44f5d2f2c1415e4c325d2ed732. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZYFZ2355756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cdae403338ec9c144b8144808a93031a9aa232666032535d6174626e81234d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZYFZ2355758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce0ab8fba187e290986b2ce9a7c3e0227cea6cb13f647c00dace09fb2e9c587. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:13Z), 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/QZYFZ2355762.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13f0e338a20c5d0493f98ffbca1dc9a769143f851b5dce2371d9489cc3197f8. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZZ662461459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29495b6956aa7cffd58770ca059c2d6489e19211ecbe9513c08b068fd70d1f06. 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/QZZ662461460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93fffc3cad70ffd6cbb7a6d3e028a1d3aeedc61400a4f1bc99e05dd33ae2db0. 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/QZZ662461461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734ad7a1dae18635a8b28651a9dae5e14ef7646e17d61a79a5f1e9b940a62b24. 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/QZZ662461464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad8926e73b16ccc5e9f84b561c2f45db2e148abc36732a006f59eaf21e7faa. 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/QZZ662461468.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11f4d7e0e748f9ad6441f058687974401b6e746d84263d51355089f81bffd2c. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZZ662461474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fecb4fa2eb9e88dddab3fe785eb477a07794e3df1c43eca09a798812c81bc9. 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/QZZ662461476.