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 0x53466c5a0fd4df27d782dcd435acc91d151f260bec193b5a539442f99001e8b5. 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/3e51d9d0-d91e-47b3-8877-c70bc74e0204.json and https://artists.proofprofile.net/proofs/artist/3e51d9d0-d91e-47b3-8877-c70bc74e0204.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 0xacf7df0ab20018564e62907446e8ea11697d98f6dcdb4caf52e38e806ea61a54. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6L2484460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298758eb8388b4c3989670d741e145e992c72424d3b4720a8c92447535be1d96. 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/QZK6J2494539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740cbeb853e9bc634dd64725ab829b06b4e73ee2e1c29f67e90026cb59b20a1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6J2494547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd154c57ebada59fb8056259eb95c2f0fa546e17853ff0edc58672bc13e156465. 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/QZTAU2217414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa271770a1bc5c48efa662988e0688832caa37957d1c24b97b7994c2bd9941436. 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/QZTAU2217415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bb89197a18c3dca35e2ed0b396bed9448924641f12376b3cea2a9984609c4b. 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/QZTAU2214508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b94c79e8c724632e2d4130fe86e5ecded791168537265b35a1a86149fad0a. 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/QZTAU2217416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b8e2282fc4a7f3c07d0b638f78c23520b71fd2626f854df9f569231d2621e7. 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/QZTAU2217417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04752975436bac5b645565a8961974b8ed7ba540d5075f9d772d5e706070de10. 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/QZTAU2217418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfb7e8e6c295d5f291ce2d588dc5134d12de8a95c0b34b670da1d051dee4ef2. 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/QZTAU2217419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9be5bce61277d0df726191547a443e73fee67467b1675337cef831ec8ce3c7a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZTAU2217420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6238737dda44ea4ca3643eec065b31550d48bf46c442da0d56922ada458d4ef2. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTBF2335937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58602172f6f7447b8c5c306a7145f4bcd3e09de7b2e42ac70466ac6e821bbbcb. 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/QZTBF2335938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe33e18276af4f795adf32aa45d06ed2ca8bc94a2794dc770eefba4307639a1. 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/QZTBF2335939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec67101863f0315637fe7ba79af5be8c724e3fab5d30705657728e10572789d5. 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/QZTBF2335940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfd62ba7cda9726f21c6c11b550995471eaebd80de0556079d89657cc501031. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTBF2335941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e9dff33dce9bb139a6f5cb5cf746f8186a27db2c3fedf197a8e8ed3ad53604. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZTBF2335942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63338997251c484d2d5cddf1528dd69b36bd58719614c9f931f6cab7c9e0f154. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZTBF2335943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bbf3db27dcd9b8273502310f399f05ed040041363e28650d34715e37d7f64d. 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/QZTBF2335944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65a97ed3cb1fba418ae9025e8d1b96e1baab1290f71b60636ca93185f951ab6. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZTBF2335945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d63cdc73d9f6c13d4ba53d96d66776be3bf5de5fdc4e0a7157d78fb2e616bc. 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/QZTBF2335946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd789e2e54a62d0e718e88cc1dc44f38f3c9c53a8739512cd9e0f063c9fdb1c. 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/QZTBF2335947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a852f372a4470b682bafdefafd70d182c35d102cb20613e7dc907c263fcedd7. 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/QZZ7R2417975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd466861a8ac6fa7a36abfcc789a77a4b7ef372431ff068117366e7f32bbdd859. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ7R2417976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a5ccc5ac545f15b6e992e1722b24400189ae137318d3c5ac4796389fa09b3. 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/QZZ7R2417977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6aaae0fb139b1ddc12d9b132a44d733557bc8fe61a400ed31fc3cdb450ced9. 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/QZZ7R2417978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e338c5d6d9e75d81f947690dd2117dda5e443aab15676b1e0b2fc7276adfaa. 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/QZZ7R2417979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3543c9e595a3d635b5eb5327261fcf559fb96497f3e9109c7b911b9068aaef22. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ7R2417980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911e080c405947f46b841b8e0a53d24a33440acbf953743377a5c0746ca4aed. 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/QZZ7R2417981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1688cf6868ef95d1cd76ec9b68aaad9b6fb9a8517b38ca2ca8ecc4e0c9bb7942. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZZ7R2417982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ada0fdc82aa41dd8d5e50635ede6ea0283b6f4746015f7e523691950fe37cd7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZZ7R2417983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121d74179024f701176620e01c99d2b9c05f913cf7030ad19d3a7cdce91d1a00. 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/QZZ7R2417984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5bb4e36f1ade16039d85dd35d68ff8dd821bf313cc2ad7915c94f80814d78. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZ7R2417985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19bfcaca377b7f5111059d12d4ec550d8109133eec619535f83e568f320784f. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZFZ42505283.