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 0xda3722ffc78b5424eeff0b7a2e2ed4449c4a17d386aa939d4fb5ad33874949b9. 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/b13182db-4209-4f9d-a208-2016ede5a6a1.json and https://artists.proofprofile.net/proofs/artist/b13182db-4209-4f9d-a208-2016ede5a6a1.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 0x5ec1a7ca610ae19e468b6ee4f2f66b808e258eff4bf417a591bd1b790056d659. 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/QZS662411163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8cf269699cb4cca4d8a038eee4823a162573dd8c1022adf50bf2b8e3d641d3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1a24f8eb22b70d5be26fdf6005a2086e88e8fabaf74947d905636028246aa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642201583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5d4468cf005e4a65f2c2174e1cc5df5044b29eca90cd5c9ed1c951fa0c0eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29712d9e06dbb147db317a9cdf7e7ad6e81503b658f06679436b781123fe001c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRR642101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c068229c6d1cac98e8ff57f991c0d69624678043be7b0965d0b73512f2dc74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRR642101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333e24305d98415c43f200f5d55afea509137c971b883c477a58e95b2f3c509b. 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/FRR642101031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd88ce9a7be05aba01c830677c9c32e6a1826ef4af24ecf351fd4a20393994e. 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/FRR642101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf5e896bc80da65150bbe83a783f2c9993fcd39ca39cda2b95191b4ae69cf2. 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/FRR642101033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7916b0cd18b27a586d997a24f67936cb2a3d19bf36fd1ee97c32884cc1529. 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/FRR642101034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab0c13700884db8de031d89289246de1ac2aaf52903d93f4749dd1a72dd276. 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/FRR642101035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4ea801f6ae49ed9213aa30e578a445841ec1e9d0c98dc9c0a58b93a9fa1ef0. 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/FRR642101038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e21eca3009af50d0f4a3907007c27ddacc00cc6f47ac810002b84ae6e4af18. 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/USHM22471721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700c65c64fb5fb99f9254d36de4a8044b9775cc0d1a5e1b5a7b6c3a99ccc5e08. 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/USHM22471722.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8cf269699cb4cca4d8a038eee4823a162573dd8c1022adf50bf2b8e3d641d3. 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/FRR642300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1a24f8eb22b70d5be26fdf6005a2086e88e8fabaf74947d905636028246aa. 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/FRR642201583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba5d4468cf005e4a65f2c2174e1cc5df5044b29eca90cd5c9ed1c951fa0c0eb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRR642200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29712d9e06dbb147db317a9cdf7e7ad6e81503b658f06679436b781123fe001c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRR642101029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c068229c6d1cac98e8ff57f991c0d69624678043be7b0965d0b73512f2dc74. 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/FRR642101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd88ce9a7be05aba01c830677c9c32e6a1826ef4af24ecf351fd4a20393994e. 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/FRR642101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7916b0cd18b27a586d997a24f67936cb2a3d19bf36fd1ee97c32884cc1529. 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/FRR642101034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab0c13700884db8de031d89289246de1ac2aaf52903d93f4749dd1a72dd276. 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/FRR642101035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4ea801f6ae49ed9213aa30e578a445841ec1e9d0c98dc9c0a58b93a9fa1ef0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FRR642101038.