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 0x85ba76791785e357254f0fe83fb3f466e9b4ffe5de7ef01edf6a40252a112bf8. 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/4fdaf20f-468f-4f8f-83e3-539bd081cdd2.json and https://artists.proofprofile.net/proofs/artist/4fdaf20f-468f-4f8f-83e3-539bd081cdd2.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 0x767e37a865ebef4c2ed02ccdf64d29538a5d4a7ec32ce615b1bea2e8a3697cd2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE5IB2332059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1e3993c3c8acdece2bfbdf3a97243f79567852f6c35d09854787cdceabd067. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5IB2313027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794195e8c8dc934ba85842af521d1e576db116a279ebdfb4e70f7b5f7996641c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5IB2327451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25424138b7a818d8bd6078c023952341f5721c770d518826ee2ffac14399fb83. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE5IB2342027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39089f7a595cff2cec08a081b640745f3cfa20d2506b0529ae6ee0e80d87cf1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5IB2322107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45e1f2d3abc466e4e48765c0a4f178129eddbcd949c505e3b54572608c77d33. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE5IB2312607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd874bfb84432defa7b5610e739f4bed4c4733e6e3b46b86964158607714e0e9f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE5IB2312395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f60ac41bea048e2ea37ff44ecfc18dabcb87397acba7c64168a1ef25f01d44a. 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/SE5IB2338983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d954bc91ba6ddb5124121f23ce8c6a4e021432473fd9e5b93faf3b9d866d4a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/SE5IB2310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896d28b1f9eea283f8cb19edc0146e79198abdcb2d7b6b274ad8e76f99d8c0f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5IB2271713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013e90a5929ef9447918680043109e77584cd8192dae9bca04f355928e372fbf. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE5IB2309617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f74cf01510b15ec4cd1af6eb11e100d2e8ab2cd62e4113a83d7439ccc13a0. 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/SE5IB2271681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5a27089d3a6b80bafc6734efc84ea8aa0944c6a60ac0d213366000178c39dd. 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/SE5IB2306479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea8b47060d4067cc27e4bf61e7c5daa4862bfa27a25417e5f3b8a0ec9c54a46. 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/SE5IB2299430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e79ec046a7e16852dc8228970c2026e2124b10f9c832343a9bccf37dffcd37. 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/SE5IB2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a82c4bc395a548325b474b94148aab348a47edc08ea13bc7f4b54c8ec51cc8a. 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/SE5IB2303260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e09f37213faac0953c041cd4206bacbb580c0c845eaac3553411cc01ab6592. 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/SE5IB2296945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd066868f66f3b201e0f11a952524fa4bab0ad7c5f39dcb7f65a8b79b5ef41c7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE5IB2161327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5878d70f0b2b9a87d6c8275cde8e891d3966a004b76f67416179bfaba08783d3. 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/SE5IB1901343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a91b432f05e70dae61e0cdc34a427f0608c616767bfef62e9e067fc9daf4c5. 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/SE69Z2403208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151c869253e4640828e479085a629da0a6d7ab65e995405c2e9ec1492272ac72. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE69Z2402413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7035ce99e5787881b7e9a5a723cc1b753dd4a4fda64b913ff258ee1f8b6a43. 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/SE5IB2001380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed71bfd1cf03d7d411096b9dd48ba28f182e9d39545eadb6aaef861bb18dd7da. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SE5IB2001086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35067341d21c23e89e7bf1a55cdf08e2abbc66bce4a66a7e6185e2cc7dd38f4. 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/SE5IB1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa92e30c194cac746b6ea57b8efe53f163242be1b36b40783e86111bbeb984. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SE5IB1700887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcd3c2f47f71d3ad054f6b9f337f33a39ca074e6fa3da06017ecd99e6077aec. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5IB2310759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66474acbc21d53b897b430165e4b5be77449ba4ee4c89ccd568ed65a40568f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE5IB2001183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b343c1227f6b9b2e7d0f262858c3fcbdfdbadba41468c74f2ed2c60ed5945f3. 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/SE5IB2307178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225d40f40363d5c14579b7f3efe217375328f9af7c3b4e17541b4ede0a54333a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE5IB2306680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b188f9cc1b51272c0a1a39cc62fb6ae693d282c2f239cea8005acfd9c11dc29. 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/SE5IB2332759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3067080e694200a6794256aea2d5992f7e96e97b2a9bb854ff27815ad3b2fd1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE69Z2409058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d61caed5045a69995b7edac258d8d54726182de8f2b152cb09cfbce6fec47. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/SE5IB2304127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7436c91d20afc0fdb74600232a5a28701763131a5cb99c8545ce31e81abdb06. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE69Z2412426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3067080e694200a6794256aea2d5992f7e96e97b2a9bb854ff27815ad3b2fd1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE69Z2409058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefab3bc3d76b086af6230f37e18d7a137519f43e710f06ed96e468c3476da87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5IB2400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc618d6d7e171ee58bd533b5029644a5119818f7cc4ad9668dba77e1dff183a. 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/SE5IB2343355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8528b2e1ff76937b69fe0e8431a0a6ed0e12d9e4455b803e5557f8127de8b2b9. 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/SE5IB2339019.