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 0xa3334829c27e53738502aef1986ba14520cde5444b50495f7c1b2bc843973f91. 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/8c278827-9fcd-439b-b27e-662abab36408.json and https://artists.proofprofile.net/proofs/artist/8c278827-9fcd-439b-b27e-662abab36408.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 0x7ecfff7fabf4af2257b73c71e6037afaab4548b26d98c9262c9453b74a9f9211. 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/USANG2278547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3ca4458e27b34162e009b6bde8f9f853b6aeec35b8dec0d7d569e9d23d79a. 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/QM3DF2257984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9957467cc3dd852df45bb8e12845f182800a27257fb48a98d81a0a0789c5aa. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTB92392436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a10ea9be0f8af7033f45d17db1d17ea4601e8348a72e0c023b3949ea731063. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QMANG2222035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2e54bc040e25584312098b8d7fe3a2c41fa20b01d57e1e106d59a0275e218. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US3DF2409381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8be0cb2cf299b8b4ec59019cde6d17b83ae861140d6a271b867c08a972150a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/US3DF2409382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb121750f2aba4b82e52e5472f42b580738912835df0075d16204dea72a5ed8a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2400734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2b08a5513b5fbff296f48b55337aecd65aada30aac7356f7745f95dd5faab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2409384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869cce14cd68b2d73f7f28313ebd91dd19b86d2cd71bc711bf9ba8bf8ac3194b. 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/US3DF2409385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019045c54c9aea5dbb2d5173b5b9cc3ef8319df17f03fac124b671ec809020d8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US3DF2409386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f5b12329810a3db924db9aa583b2780e919d861dd11e95a094adab47b3efb3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/US3DF2409387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb53bce2ee3bb1927c9b4895703582452a4c3089dbccb22cec334e599fb44306. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/US3DF2409388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442f4e86f331021881486f32ceecb11157c69522565086e7b723349b1f2ce87d. 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/DEH742408913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbd5b7a6f5f308d563a34fb0828165cda52b2848316d1a87956b2d9dac6c2e6. 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/US3DF2410762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0d0613ba4bc0fa33d78c1319d6d7868dd871db17406314e6c5034d671cc398. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USANG2408587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb504240c35423f59c590ab6346e94e74a61cb7b0cff819c6556d8f0108088605. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG2410137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e12073c46c3def51bd6cba54039e64deb4effda091872c1a0022b8b417f8a8. 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/US3DF2502169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372a518be9a8d4de7266a8234cbadb8975075f0b179a26d6aa648f90519a04d6. 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/FXQ892500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d74cf11dc22c3e2d4cd5f08dfbae37d37111c03f7ed8beee890809ffcb935b7. 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/FXQ892500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb277e9ebe1997fa59726e242ebec3d08b6c396683aaee6d8d157f0579d061. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FXQ892500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f97ea95cf8d3e0945430156bb5b5bb4d2ab2d7a3829b7faf81047eeed6c0cb. 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/FXQ892500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf172489339fa3091f113e522e3fcd940b2c043992cba396b0eeb2404f98d959f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USANG2520989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ec8265211989ce97b39774a4c4fb6fa98dcefdf74fd180497ee813e131f8fc. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/UKZGC2406950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5fe86c37c7a1786e00f1f097a32632a100e15c5cc739485848a23118d1e5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2498981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d1658adf4c3bb3b05fe781962bcaf5bca2745f91545e01dd7596e076879838. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USANG2481751.
Clouded memories on an evening walk back home - Reworks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56e46d2285d5f5e3252b6823786fe883a4f12d2289277d426340280f70f3073. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2536534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce04315438ea5334d2c2b6d38435b353e6b5425226b11810faf1822e3d154f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US3DF2536537.