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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373174eef8d1c36eeb10931173ce0f18cf609ddbb2a44e6f472497a38d751d71. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69f9bac1-7ee0-469a-b4a1-3f7f39ef0a9b.json and https://artists.proofprofile.net/proofs/artist/69f9bac1-7ee0-469a-b4a1-3f7f39ef0a9b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395d8d9d4f77ad46989b4df3cae8b08c3cfd21eac8654d5fa06aae2429e3b10. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:27:28Z), 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/QZK6Q2227191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bca78a405ce082636c1376d44cbff6a3455c505fa4eef51b73f292b8d2d2c77. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZK6Q2227193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8573e2d84b01bd855b2c225ec2707877b222bfe2044ffafa129478508e0103f6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q2227197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c38b46e84af88fecf2958e96bfb52aec0254f5076ca4a4177ef68f08882c22. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:01:06Z), 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/QZNWT2221333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aad152f670e82c087fb93fd891c4df7685f14e031e91cd68e2c25e6842116b3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWT2221334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0442bbafd76a7ab88b3acce358755919d2584190c7bf2264d7d9d4a81db283cb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWT2221335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14562b6bf647db7a2679c2b41366119dfa7c8553e8bfc9dfc7f93e9a98122ca4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEP2357358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18ca375dc06cad0ecea2584540309ebff816ae0072876e2ba37a4ac04d94d19. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZMEP2357360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd7080f87af9da46337c144298450775fda3b85e70fd761e0ca71f2663b4234. 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/QZHNC2430430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8421548730f446ce96c0deb65087e51ae0f6a3c6fa7b7fca6f0437d2cf86ff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWU2491283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34457d3e027fd49fe496d4f26b44464b66f0f4478868234e0059f341a9b7b5f. 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/QZTBF2490427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26309c0fc838fc06fb8ce92ed5242e48bee6098184e35a1a6cde225aefab08c. 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/QZTBF2490428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2439c1129ec775d3992d293e07e8e8af1071b6e43dd4cf3bb3a777dff0e7acd5. 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/QZTBF2490429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dde29d9ef3a69e4af15022c35dbcf813f55e9c00ffcca51deb6330e8dd9681d. 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/QZTBF2490430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52830620f880718211a5da5fceda9534df5da33f3fc85b68ff42cd86c12a778b. 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/QZTBF2490432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dae6c4d89ed2593928deae124053fcf9e1505325e8185c44f55e09c5c6232d. 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/QZTBF2490433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356e2ecc19ae191b71e050ecece9a45baaff926670f2e649ee747dbbf9880b3. 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/QZTBF2490434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e8388a927d2bcdca5090c2cb335faa7cff19946563e3784a5f6568859e6a8. 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/QZTBF2490435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9caddd754eec5e04dfa44990d4015e772458e137923b36d4138fdaba1f943d. 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/QZTBF2490436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feddb09a3a181240a31228529c2cf476c859b03f5a6f3687d99e8a78843b916. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTBF2490438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1b31526074a77267c2b2de5833fd36408779b618d3785858bb30862b147665. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:49Z), 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/QZTBF2490439.
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 0xd918253a8c2e1731d495403c9385b8add2dffb7f9d8d0e8ed7e248af5507cb3f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTBF2490431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e5eed56a5963e69ad127653d7e92ff38cb627368b9ea2de4ba395c844b5da. 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/QZTBF2490437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4456b8dbb037bdcc522500a0ab393929a1e4b8511288d688322e67a63f4f5. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTBF2490440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a06feb14a1e9e6288783dc2c518c1608b31e0500c4b3a531aac2420b7b5fc5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFE2416941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71a3ae09e53f6edb44ad491d70e71a070c6c4163f3d59ce08beadff33727d64. 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/QZWFE2416945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744282c35be36c2614ec71e73650418327583f89f6860ca709a2727f0fbc600c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:42:14Z), 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/QZWFE2416947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bbfa971d1467a04af0442864e97a0befdf7ed8b0aca14f1e5fe2b59ea7652d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHN52533764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3df6ceb4e56da35d6b002662343448a3fdee822423e953dd7472ea397fa5066. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN52533765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c8358d3de568a7c1606134e70e4edc0dd94c42c9aa06c1f3c334bcf787bbe. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHN52533766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e88dcb35f488e70a917bad541ace23a81681c44be059e30818638c118d8b2d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWV2248863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0de92167afc620540e0000ca77fbd600a97337cbe5f5010194ff46dd3790ce3. 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/QZK6J2113256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da79b80467b1b85e90b3eb6c9a4c83c9e67b9c38dfe4a4009ae1ef498a6bc62. 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/QZRP52268713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0497e457eb6f4f9a5eb6571e239e338c34fca40556c647e954b239b001c785b. 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/QZTB62209546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660cc875d79ddabbc7be4245eebbdcb10c37b25db92285314fff685095227fe. 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/QZNWR2258077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5755847802d557a981ce70f8fe1158a36c23d8213a611fd07dc249c4f2143e4c. 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/QZWFQ2327325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f84796dd591b7ca018ac380f9513a10815fb6def3830356b9b299250d92682c. 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/USUYG1549745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea0f07496997172b65e66f5926ca3cb972b5ad364f0bf2ddb21a8920c9973a7. 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/QZNWT2283217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf125a5c4f39fdfb545e5f35a21a273e64e1f4128e0554240e242f69afb5f138f. 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/QZK6F2143465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9cc3e9ff3572be2b679a9d3e1d3973b240a20749cece8f7dc12547e2ce80f1. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZTAS2176032.