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 0x56936e5b2e21c0bdba0434cd5aff52d52d67d5a9aed1dff7d6b6219d0d3a8591. 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/ff7d9955-7572-450b-9925-acf280379c9e.json and https://artists.proofprofile.net/proofs/artist/ff7d9955-7572-450b-9925-acf280379c9e.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 0xc0ed06c8bbbc04006aacf3d600e48efb5028747be9126b0beb598751ff950277. 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/QZHN72051419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d5d2f080098a6cc42ebedc86d669051d48817043c8e22ea9d8f6dc632bb70. 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/UK2FD2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f199f28960c69c21a58678884ed3626ca5a89c154c848b545be7c8f8b48556. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKR6V2116949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd648e4bd82cf515ede170274ddf006058bbbc61a061d82d98ff4ab1ef85108af. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4WT2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a81936c7911ab776c91d87679a7df141b3b297dffc87481fc5f48d3a3c648. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/SE5ZV2226901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1370cf6f9a9779bc7334e03befd9da873cf52a73e4b0b950bbf7c68c6b4c57f9. 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/QM6N22286046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96105fdb9d3cf8a3d312bdf90ac2532b0c2b9320a4056d4e779ca5649b214749. 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/NL4WT2200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e24faecae39d08122f6bb4a1f187fbc6d8a2cd1391636c36fa04226e8b3b50d. 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/GBWMY2252130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ede2b501855ca9fa86675ae76b6704a8e67308fe7a6b35d9fce61be2ff55e0c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL4WT2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b9c4e583a924d5fe0ed5ae687411e5e4bba6c3b7332069cc2cd9abf90a01a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:38Z), 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/QMFME2250496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad516aade4ab80f355692b99336ff27f65b852e9b2023024bed47a8fb0910d67. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFMF2219210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e6a32a00da17e6027b884901016673645eecde5cb27fd52ce4f1d3e4a301f4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QM6P42324158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2ca6c3382631e8e08a41b49c863270328fbf1a47a7bd25105566384226facb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMFME2308189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323b6cb7a2d6afc4392bf1754f467f8ef2e73e1367e19dfe1bf438313a98b448. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QMFME2390179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32eb03972efe604c4b296b20206cc0a318288b3eb3f356ad40922cfd088fad. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFMF2392397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e6fb2d433e5fdad2b379df54f15deafb248b39543dddbead3395941af68c01. 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/QM4TX2433188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794d3cf737010b4acb77bfea922ea0291a862d2674b67a73976a65dfbd0e49b1. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZAKB2457563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8e65aeb6e79308b4e2ec4b3c167a2f7b3c7c5eb24f0695f3f2182198dbba56. 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/QM6N22589354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e038db0a0ed50c28ce2977f52d7a784843c8d82a240a22156ea82542eadb26. 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/QZAKB2505989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dcc6f7b19ca1726944805a86e75c7122cca84e7890c8440f924d215797fb63. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:33:29Z), 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/QZAKB2512250.