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 0x8cbb646dc783c7b04f8241c49f035f88e90d4f14a59b55eb7ef8818dfc99629c. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96551c9b-41a1-4fe5-a4ad-4f30ae023fee.json and https://artists.proofprofile.net/proofs/artist/96551c9b-41a1-4fe5-a4ad-4f30ae023fee.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 0x16043119e5221d4033ada47409a2bcf1be51f2b806ab7ce6d2633673c08aa57b. 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/US38Y2420143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ecfeb5c8c10a72c8bd7c2c55bbd334e21a2778d4083476699f03acd146d200. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/US38Y2413687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd7a9ae155f179480e96243e6e9180f29bc9820bb54b0dc6afcd4f63383e922. 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/US38Y2417218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd322430df63441bb07aaa6c603860c6b5f5f692268753d5ca60155550b4503ae. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US23A1572697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9c6a28a2cc364c56ed7188280dfaea67910cd9023adfa9c8f5868fd68c5ab8. 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/US23A1552616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832bc9c20bdd19f49d3bad1389159c128a27a822a9f430c1ec29ee5c073b2b0f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US23A1550256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948309ca72502af8b1c8ea4af4d07f91ae4721b06c7236573b80ff860530a19b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US23A1546732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bc70bf334fe2ac39021e10bcc7f0679c64c9eb5608c5991c56ca92f6cc2fd7. 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/US23A1512157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa725737ef2cf8b07932ac59daddffd3be95900072d17f3faa1a38596bd24008. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US23A1501458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82ef18bdda5cb0f7f6a06f915b163150f84f27ae7ce9ca222a852dea4b9567e. 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/US23A1501459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e6a8dd7bc7707d41931a636914606cf6df0c7199eee9832636e98d63473886. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/US23A1501267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92241985246abf08c5c125bcadbc4cc8b347743191b1e75b89434f789b50301c. 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/US23A1501017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c38d2a2c75d55b447f6710ad7edf60d95e4fe52841ce7d8d8de36a928dbaee. 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/QZFZ62098830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a5cecbf834a9e14161358be7bb848a2f775524454da7fcc837cf30f1d8f597. 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/QZFZ62098831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799e59d9f2b8350baaa242f5b3676642994e9eb84b5de428edd5d5a2a75d546c. 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/QZFZ62098832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8447442a5128a1dffbc24fc48eca6bde5518489374b608b4ebd98ffbc2f3d4ce. 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/QZFZ62098833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa26bc98ae143d113762a69dc4ca432c28f0dd1bcdd3bf9487ae04ed18c3d9f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZFZ62098834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc0d1fe544a771fa0a1e0428006369e5ed58ee962474782e6804735061fdb72. 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/QZFZ62098835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4835eb99929becce743c0fbf16447f6e2c56dcf195cf15d7f91abaff5972923e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZFZ62098836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130e74e4ae2c832217f762a8bfbd2261444fe3eb23ba10022317e809f6ad43e5. 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/QZFZ62098837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6bf81f719f50cace73f78f05fec9abadce6c45356e7633af76e8e9f172247. 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/QZFZ62098838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bc6900f9488bf7b9686fde89144f7f11ddc4f8d52764aba07768148f1d2cfc. 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/QZFZ62098839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b95a07e4da183e257a92bcc7d94ee4773416ef540e8882752bcb8dc30070d7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ62098840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3a9365388250e0baa5e6b144b5759b7b17afa500ea9cf6491bcf254ee10335. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QM7MR2000399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6a7f27160cb7c7b35e31470b46f46b95573c7d64719841ddb8dd09de6f4615. 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/QM7MR2000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5117d58847d15eecba5ccb79e002bb4ee3866c867bf6a774bd09a8cdf929ad. 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/QM7MR2000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f0190aad286a69cfc607b52c81e709a9d57e014faad6dd894e275027dd991. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QM7MR2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f49310ddab16ecb38453e291276c8c2f76e46361bf3ce3e9d4da9acdd66105. 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/QM7MR2000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bbcaa49bb0ab0edbbbe92d3d5e83b5b7387f4b5c464e04c481caecc10bfc3d. 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/QM7MR2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc312aa3943d14a846c4c548129955252fd69c8be38eac632f30632bb4ccccb2. 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/QM7MR2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1efd948219b3221186a6210595707c94520da81c88525ff2bf4a47db2a18257. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM7MR2000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213f57b8ea2d4a71a88bc7b15b22976c56bdc43c31fce36f25e52dec8129de0b. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QM7MR2000408.