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 0x2007145ad57f11cab51415ef88f9a01daabeb0330890009fd76b0769b077d2b1. 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/9c052ab1-9ade-4f7c-81b6-453345571b06.json and https://artists.proofprofile.net/proofs/artist/9c052ab1-9ade-4f7c-81b6-453345571b06.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 0xb31e502e18688c24d1690d9f3bafe262333f490b9b02bbae24426c96b05bec9e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL8NY2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211c194f1a6fd8b204029876d9755fba69e606177812dd6778c95d4884e238b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX4R52336308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54a2dfa8c54d67beb141865b096a73f5a9529f8235f825533284051e6df2ce. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GX8KD2377269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2969afe88b19a66c6147a04b976db67f5010f7e182fed9f47e685a948eb73f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX89G2355378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3466323ef0c30385917b171921455d121d8d919bda68f011c876f8b5e5c74d10. 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/GX89G2339574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd4fd19a042c70b97de29573e56ca2941331b16d9f8235a00a6aaa8d4f235a7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZMHK2391822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff89f3a5ddfd5f06a892505e75714e132d9bdbddd13f430b3735eb357a92365. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM24S2206428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690d13dc8f231ae44b0e1def8a47a507b18b7d7085f9c9ba01ad7aeeb37a0c67. 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/QZMHM2244232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c45629bb9867a57dd8c6a29fe640d484320e906f36e41f9027f655e04965bd3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYQ92200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615b36fdfe00889632aff715b0b37af0da0d126eeb6302692043ba0254936a48. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NL5WB2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6d3393057005a97a8de4077105dc0614ab4e6efb42e1813686228ba8a931dc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL5WB2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4859875924b8ec9bf40bceeb73ec7296d8dbe7be6a26fd205ee13d2576fb8526. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM2J2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee578be2e683f0b07aba41ab466a508d1d60b5217d7ae070eabffd7d2ef9691. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITM2J2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada3b4bea566d9a31d7d2bd176eadd584ac7e356dc421a6dbf57a5c793a8e160. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLZ542200552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87c2d9387c615180f2f716fae498b053f481e783f1c21dbc011b29fa23dbad0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLQ8D2200634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66749351312c4f0c7fb75d35c38fa2e5fc8ca3d408570b882bb253016b522fdb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLZ542200487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f91036d155156079f53780fa357d53dc810e547f4f70ece2379ae457e4a72d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5WB2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d23278fbd7a91ffe36d43b205623d5bd55e669768a3788fb7a011e08712884d. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEYQ92100173.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee578be2e683f0b07aba41ab466a508d1d60b5217d7ae070eabffd7d2ef9691. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITM2J2200012.