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 0x365164a57374fbedbcb6e30e77339468de984631faa10f630f6b71f430445413. 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/a49925b5-c600-46c1-8a1e-6dc828a02256.json and https://artists.proofprofile.net/proofs/artist/a49925b5-c600-46c1-8a1e-6dc828a02256.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 0xbb07ec43addb7dd594c20e57b37aba52f01d446e804df1c8185c70e5b6902bb1. 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/QMDA71862966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6a4d6103154b1da81066af54f9dc3829f77966aff4b226624b629768555f10. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QM6MZ1855303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d6f164ad37fb1c81a8648cf853c5eaf4a7279ddbd0c0c0548db0763d0a6417. 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/QM6MZ1863940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4e51946b25f5927830d7e0f9cfb40419ad68b99e63a482e873022ee74030fe. 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/QM7281885128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc30fed2949be28225e3e7a65b963b8109cc8580fecaf38e047737272c7412e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM6P41802318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1846f7b09d0948739a1d6be8ac34bdf50583e9cef7bfc7e8b49e0c93555367. 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/QM6MZ1863949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db8ad3f665dc38c3ae90b0f9276fdbf988070dc58246516606f6c4ec9ff2dc. 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/QM4TW1899645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ffaf22ff5731d56603c9bd5f39348cc5dff53b63f6b0938629ea93a8f2b759. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QM4TW1899576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c22845abb6eb7c435bf77b2b7b2688c732fdd4077c3b8633bf8f2737bcbd7d0. 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/QM4TW1851390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220982e3d89041c3e20dc28c81f1c41d1fdb4f3414bb385440a83f00ae3753e8. 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/QM6N21925074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606ff5ffdb7173a9b12bdba7d47b89a59c3417133511c6c42d5c56fdd014dc6e. 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/US6R21371961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f44404a33afacd81912a58d78a00090c0ad83b9f3544c6298f6d410d75ab1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US6R21371962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5966ef8662bdf611c111cba820883c548554f100fb59823832a25a324868b5. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US6R21371963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb329321dd1680bdd6a695007f35ee2b240887d797bd9988dfad115002c8bd88e. 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/US6R21371964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaafe59d032111cd3df15c1675cecb3527f3b1b683e2d622f9264c456ac3a7c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US6R21371965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f03fbb757218b3465af6a4b894e4241f095474d725211254fc2245f9796e6. 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/US6R21371968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406cae887597d20a00d2e4493c36a1bdd03ddaa503edfeadaa480d998c3c82f. 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/US6R21371969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d9fc82016f525b8a98f4cd3020d8552a4c474b31f106849669a09874e6f7c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US6R21371970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d4db152d1a094765b30fb1f71ff9b3b2f82243172226837fe253107586ec36. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/US6R21371972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0b247f86f638c4686d0435606083600c1ae5a5f3ceeb44753a73941a441ebb. 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/US6R21371973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a0b86fa391980b0218a78194b00abce55028bbe34b45d0af763d64f1bcb009. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES71G2150172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999ef9ad36e803f4484874930d9e91662af884908cd75c8788e50a6d88f11a17. 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/US6R21371978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd59212c1c6dd51fc2662f63cf8ce8a3f150e6c15bea0e933bfcbf3a15a204e. 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/US6R21371979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e44e1e2d4f581f498526bdd20397a4d4b10ab406149cb682ab0aa00c8fc512. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/US6R21371980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e78a764d6d8f8b3afed990b916c207f7adb157f4db8385c4f5e088a5332bb4. 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/US6R21371981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdc06d092fb19034ad00364c4a76fbd6e7de39f5e02180e27162fc5d2249437. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US6R21371982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190e288bcb701ad07010d7438bce5cf6ae0ed244643b37119ff666a53aa7630. 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/US6R21371983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a233520afdc734e4aa74c6cb23a3d8b11f225f3ae6fbd9bbf5894298f5a64. 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/US6R21371984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc2b4f66a0d34fec0188998cd165743204d439a16770f1c077b1aaa040f1e2. 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/US6R21372016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0636a2dbbb59fc12202412a76144336caced054131757748262ea07e1e5a4465. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US6R21372017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e08899e4ccbd6004ef5da5df813ae319098de79808c8412f4c320f85acc4d7. 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/US6R21372031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958ddfeb795f0eb0a35f8da78c7c19b518c9e558a08801acaac5eedc8372002. 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/US6R21372037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fac65c79e3439e977687585ccdf9e1d2ee5280d412d268383634b76a03d96f6. 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/QZGLS2364932.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0e9022cb14f918047a3dd8689f59d0fb438d1e382b466e9e3cc76abdf17151. 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/ES71G2423959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9cd144a5ec008c8f4a97b321af882630b9594d1d9a52159f91333129ed6bf. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMBZ92056103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d9bf66122b7fd14d391f1c84535a669399281acecfe1d7bb5c285624f157bd. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMBZ92056070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9c43fab00907db4d5a9bda65956267555782ed877e86b2e97e52ff39c41a74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2328267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb738f7ac2aa2e968b7b6e8df6d54897751cb63ca91cccf8dbabf62a38506b395. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM6P42089041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346234ec9a44f5a91c399c44e5bb3eee55cbbe53320b186d04a79e26fcd2d98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92056118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb396532f1ba4bbfbf8c89262d3387d126ae47db7063990477e04016cd23c224. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92002115.