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 0x3f705ae046cfe437e73d0ae79e715b580d10519fcf1f950b298ad08af799511d. 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/f1815c71-3304-4e8f-955f-beaac43dad39.json and https://artists.proofprofile.net/proofs/artist/f1815c71-3304-4e8f-955f-beaac43dad39.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 0x5e62efe0901a02dc782d456abe7e701fd407123b451b5d58d7a961a9a69412a8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MX4971504307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95459fd7d1c780c5bd6fdc363828ee604cfb778c27a1b7412c4ac8ed1679ab38. 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/MX4971504316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bd3552d4b1f412532212ca7e0b7857ba5eef70ca8dcbb3a64a8ea640eb203. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MX4971525914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e441b387a2dbee9f27b1c5fb728051a2edb72e9e363f1c5d6ae568026052882. 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/MX4971529576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccd2a17d4e9bb38609efca11ce080ed7e0e8366fe00b2e4d3b5a79b8d71e750. 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/MX4971529583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c396c48ba17015677c84e85dc53bd51509475f2c44b13c24fd4f9f046127f1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MX4971529557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a675c10793b545075bee19096e3c8522a6ea600697f47af078267b83613de5. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/MX4971529559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85807622c5454bc9f95647062f295eb74c9136411d38500c5e79d8e59df41e2. 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/MX4971529560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d1bddea0888cfb4e4dbfa1322dc701f0529a229f6b7b1e73a74089203a1d85. 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/MX4971529564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3daac81562409aca22dd7b0f045efde053191f3e7eab037bc963547290b13a5. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/MX4971529565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4a172bb04041089742cabd7ba3a8e26271eca1ecf139d007240276a6adbe4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/MX4971529567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d03c87d7f924293a5c326eb29922ec29b54c3ed392c5b1a219a959f1be7f3e. 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/MX4971529572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa1dc052539070f4bec80747826e52c0e46a487980eb9f848f6bc856eff686. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/MX4971533319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b376951ae6bd1b22f7c271d798d4b976fafb2550456ab76a7520228f30401da. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZWFM2494165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b80b65d58b6f7ef115f8b32d5d0e2f9198acfc6f3c9108e4cb652adb3bae8f3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MX4971538605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6f065e4ba8ab3b2239be59bd300fa2ea519c18ed1050aa21ad216f5bbe22ec. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNJY2112346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4997a850f14c490911f61b68f575491719438cae2d18400d2d8142b9ecbe2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLS2213355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55daffe6c5d6873ecc5c5056f073df9c7818b8dd1f62ad6b20578a257d86c755. 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/QZW9K2247822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a636fecbc40a72c49b4abefce256aa755ffa1f4eff006bd054b6e836fef0bb. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZW9L2253577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42652a012a970480d8d2ed438e5a0ea7693ce9a0363f88d01ec3569123cb371c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZW9N2255257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933196f43ad6fd3dbb053654f17b42f1dd3695698abf57fee145bbf78e9f12b8. 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/QZW9N2255260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb6b9c8951439ab7e669d81f4e4325523253f08dfbb8ec768c6f02678dca5e2. 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/US7VG2358701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2d1a28e70f6d5b4b9eaac3346e67cf65b67ed26b4427647a4a02f00226e4dc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZTPX2368510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1082887d7e6993b922549d4644931367320dadcfac23e4d705a05745daf2491c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZW9L2353057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc84a10fca8a46bd9422c2880950808c60b84504d6596f518507d29b75ee9b3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZW9L2398102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707dc73665d2d0cd70aef9d8f21b3fe87cde0e6ade8b9e26ad506475402191c1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMZ92409482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c205d7645d3ab24faf0c468c51163ecb7063492274173562c95a4bda78d888. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTPX2443767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3832afad6abc90815620ef890f26308764d0b3bad23969a33198d8984317dbb9. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZWFL2473391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9059925f77844def4f5f298f132cc24d06fffdc0351132549f0acd34d96720ff. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/QZFZ62566466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87f3a5a614b29b278704024812c9d9c9d434ecf86266a059dbc376e35a08f04. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6H2501656.