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 0x1cc08be99ecb0618ded96d7c3b38e25fce0e01635b3a6db0199bff7622b95953. 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/14ddd08a-b073-4faf-bc3a-2199da59e665.json and https://artists.proofprofile.net/proofs/artist/14ddd08a-b073-4faf-bc3a-2199da59e665.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 0xaad78a52054ae6e773b4e659a15219f96ec89945c6e0d1db41fae1e1c6f7420c. 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/DGA052454853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d43f31b2ccc617abae5a7989d01a49ef3e2fa39424167e3e23627956c896d. 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/FRX872407771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df5c59114026c856db52f280ab520344807d32b758ec536f6a62f7c12679da. 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/FRX452473562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d209be5a6a57bca3789505141343906a0982455fc735fbc92b41a237667bcdf. 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/FRX282486555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b570e0e92d28e050619c38111fbf3096c2fd4145c38c643f91fd260c4a14d5. 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/FRX202488387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd2bdcaba342baf8026f9e52717abe547db10b78f53c7cedc45ba1d5da7b57. 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/FR59R2407991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf362558a061a958eecbf075eaa92c5822a884306486ab14645fa6c5684806da4. 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/QMANG2247226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8153e9892d6ec8bbd0c10a8ef9b612547f0b93a68b733cdf90e2b90d333e6335. 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/UKZGC2307586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fcc50db20eb90909af41a93f71e6d45b3f11608ddb6e00329b143cf7913ffa. 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/QM3DF2288612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58db2d5a1ad1f04b2bdee58d3f27e95d5638ed187cd2433d922a08e6bec9f8d1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEZC62209586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6274f10698f8f794cd4c4d29d56db45df9187a91ec5a6e4791d4b51e5a0deab. 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/USANG2216558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b84a3955fd6c5a1dce3f2ea7fb4aff869949c7cf91fe0b0420d5e7ed23b6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62288401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd8685afeee7d958c980d046e3bce04330a6acf95599adb0f7a2e53c8ca4c4b. 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/US3DF2261985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eff295539a41fae321527473326f0401c453001e4452035023b35c3a134463. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEZC62266055.