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 0x6ce0e7575607164c87e336210a04a5bcf9a370707fbbec7e580b06b2e8cc578a. 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/5e986ca0-3534-4a3a-8d19-013b6c426a1d.json and https://artists.proofprofile.net/proofs/artist/5e986ca0-3534-4a3a-8d19-013b6c426a1d.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 0x7080232dac0aa8c57705f35dc383a562e082e559d335c45ab627302fcc0b2284. 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/DEGC62002290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39dbbc72b79f243c56d795795c402916830dae9107446ba370bc253de7d54c3. 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/DEGC62002295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d41bc745d175237d5d27eb451d3ffb9a4ff2e8d36e7e4bfdab0fbfbb29c3387. 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/DEGC62002291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708065aa3fdcee1d619029d80fde26b4c58e1d62a0e8589aeabfaf135cd8d066. 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/DEGC62002299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6e93e07cc5afb86e5cf4b29603ae06671215fc4bcea3d3cdfb6d6356b09be. 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/DEGC62002296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006915f95e095562882c6475eb74a1f2b394608caddc0ac52c8285fab800af00. 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/DEGC62002298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bddf192db4b44d28fcb30e69e001cfa5b629615d8749ae8db42e7c167a04d2. 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/DEGC62002303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5d031c91c7bd37ab0ae3d5a0978f2d585a6137b7b1c7b311fcc2408738ccdd. 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/DEGC61902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b0dfcaa1b70631de3eb1bd0a4aa7e1016c8df83eb655eacec63dbb0d522f49. 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/DEGC62002297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dcce3066d692c031121d2bc0bbe0a85c92248f6ecab9a77ab9f16067352d34. 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/DEGC62002292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6fac130d280ba0f822ef06a4f4156b319d873f1a23eb3d22c12c2c1b1829a8. 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/DEGC62002293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a9da780a4e1fede0df145eccc1d4ebd3c8bc7016511e4742447d680a86cfcb. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DEGC62002294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d00ea3e2e2b177643a7cb40f969caf82793ccb293af94477f572d1c8b4bc3dd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEGC62002300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cecc8e695bf69218aa95858fb3291affa35fb6699a8f9381b4ca025e3c37c5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEGC62002301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd70339069354c26e817b1407bc683403dfcf9469f6be8ff28d1f532b5e8bb3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEGC62002302.