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 0xb019b84e14089c68cf86f0213266150e3397001f4fc198d8c37ec9991f7b8022. 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/8984f51f-58af-4f3d-b475-b2bb03d55be7.json and https://artists.proofprofile.net/proofs/artist/8984f51f-58af-4f3d-b475-b2bb03d55be7.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 0x8198c94444ab6b872a639a4eb77492e0e48f7ed53a59451ee4a9a38cc5a69bf0. 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/SE4RG2302712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd910065f0c3ecb35c8a5145831de289e0459477211936efd1dce3d2021cacb. 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/SE4RG2305244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8e7c22f21aa37a0989c6016287fa6d783bde732daf56d12d07d3d9796577c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE4RG2305245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed710bd28b782f08d9019600af08b8ab8c3b16ac290683bd566616e725845f3. 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/SE4RG2402300.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84146212be7efde6771fa9f7b047e1235b25699ad9aeb62739d23154ad07fd1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTV32483738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a9f58eef301da96e97f63b82c286300fa1367e7efb0ae7eadc58dbf66eb120. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTV32483751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713020c373c4bed40e6bcc7952a7a47581bf3ede82a3bae2ec5c992f2d2bd99c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTV32483705.
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 0xbd75271e4c92e8852c977bb1088f3b01ed357c951d027fd843582328ccd26403. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:45Z), 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/QZTV32483753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e826afdf95806393fe92d4a7d175a213aefe465ec9f928bf392d339830285. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTV32483651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e970115b3fb70e825fd77fb2967d9a00b002b494171e3030e9aca9c8837bde. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTV32483690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bf677349ca8877c630b33b15c2f2fdc2566b1f9e45febb34b9968efa3f1636. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZTV32483695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d685bc3180cef50487daaeb6c7bb3f7cf6aec6b3233fa5a236539ae96b478b2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTV32483704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15a3bfd606b75b6af7732125a0ddd65ccfddaf9edb46cab96f46a878037a63b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZTV32483709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78786f5bccc629fe315aa0d85296137107bcd290bc984506e590c2bfb4d59099. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZTV32483711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961fd60d00d2c16f1d9ded822a041872077f31d6f17c6e5b5039711ad91a13b8. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZTV32483713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c1118356693e03fe20de4fde6b61cf970b56c8e7d095facd7eb956976884f5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTV32483716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ed852aa595a6f9390dc958942ff608b3b9a211f1749976eb191c134b8344e7. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTV32483718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d7923a8f96b9535426ce8fe00d05fc3e329f0a30f1c0f1bd22179d2c73b4be. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZTV32483742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6147ef9231a9baf04d21718261d66751259240d48fe49d529fabb0587a71f0f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTV32483744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2968f6661fa9b8820d3f72a7dd0aadd6a0a39b6e557d7f1e0e7e8a08b7ac2d7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTV32483763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594a61dc9ab0ef065b8863c2568bc2d7c3df62aefb0d21ada9fe041e63eb3134. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTV32483781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f4815ffebad478e2c20c3ad325bb7237b0848af46d1dfd066c270a1fac22d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTV32483787.