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 0x9bd29e1a85f1fdcd939919ca321c8cd7fcd31eda63cf35c0db9049ab660c3436. 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/dad63d31-155e-4821-a7d8-70105c374717.json and https://artists.proofprofile.net/proofs/artist/dad63d31-155e-4821-a7d8-70105c374717.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 0x01917f986220c4950f3196d2fa733d2d02cafc814258d5c53093374209fd41fb. 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/US83Z2330645.
Quiet Times (Chukku & Jo.Ke Rearrange Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627e2ecf876de2163e500285354db0f7793895ff5ec70aa4b84370fd13ac7b08. 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/FRX201745988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797cfc4a1dd46fdf39256f742860f0c86c922af2f4e1ceb19b304bbeb4456e7. 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/FR59R1625542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48248ff42e41226e9193e850ad2984502e7d35db2bff216b1046074002e4d277. 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/FR59R1625546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80198467c1999c4877218fe6218becf524203e72df1570a3c59a9d23e636e9d. 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/FRX201745992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ddccc94bcb30e33502a286db9899e8e8f9425e4f3d52e0715b9aa043dde8ea. 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/FRX201745993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7301efdf21bda123d5a82174a0535ae42c754c3057119b4f0f43d08ce9956104. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR59R1625547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452374cf7bc8b6bc199e69be3f81912441ab563e0bcdd4a87d7c08aae79169b3. 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/FRX201745994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283af797e2e92f0e6143ca9a8590b01b1587f303d2431729055e2aea12a907e1. 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/FR10S1878660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fff019ca70f3bd36bde18cc6dc43522b6973c3f243e0497a7bd460f1ebc5bc. 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/UKSP41900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a6ac39b5189ffd9ba7e07e58385ccd14a5cf7d2a54190c2ea5de185c9143d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2330644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a6ac39b5189ffd9ba7e07e58385ccd14a5cf7d2a54190c2ea5de185c9143d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US83Z2330644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01917f986220c4950f3196d2fa733d2d02cafc814258d5c53093374209fd41fb. 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/US83Z2330645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a298c574569596ddb7d9dac86216b0999f9b35ae8c8d17eb48de1e8c3e3e67. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z2330646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98957080a4d5c20bb159743184fd727a3a4c12df2607349f1bb07f9b45f4054d. 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/GBKQU2380667.