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 0xaea123f936d21a4304118ee08ae3ed411478a6b563c0d0c73fb63ab652e00747. 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/5e4b18a9-6606-44a8-9d3b-6e1119edc49b.json and https://artists.proofprofile.net/proofs/artist/5e4b18a9-6606-44a8-9d3b-6e1119edc49b.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 0x820c5e4ee9d471452c5e8fbd2670c683a216c5e8df2eb499082a557d892d1bd6. 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/QZNJX2424132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ace7aa9e4651902f86622e7b9999f071ba0bdc0d780e873bdea60565923255c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNJY2463318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae26f82ccce1633fda78bc1a2c34b4c3049dab5eded69b0c3d36660c98370fc. 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/QZNJZ2416777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0671a0a2ac7da2842a96f79bb4160814d15ceecb484148c47105b29dc21cba. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWDW2445702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b3133ca217f592493078be71da0ccb67dc2a50efecc2993af8192b6f86726. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZWDW2464100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e2fa3a3f40368dd93f124175e534432f2f70da7a2bea4077d6bf84aa6fc702. 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/QZWDW2532809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3f826c3ea6d19f3eabe8b2c79c715b67a6013e9c9e5bcbf8b9564eea5074d. 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/QZGLM2079744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a24999f9aee243d30abe8b7cfc8f6d606b27a71590cc69f87e733ef332c022. 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/CH7812404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3f826c3ea6d19f3eabe8b2c79c715b67a6013e9c9e5bcbf8b9564eea5074d. 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/QZGLM2079744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf1c29771d11e7473daacfe87a28e8f8c0d4cba1de3701000c3ae2c143a3bb. 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/QZW9M2252550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3bdfb32fb75c2e600755a9b6c34154f65223b5dc7d7b419b2ca68c7cc99925. 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/QZNJV2036328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a16d8a352ca2897ffdaf7b0b60e091873593e2a8856ea846edfbffafdc7940. 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/QZNJW2018348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade8a4fc77c514e7885a054312322c21d0fd062f7fe140711eebe67df89009f9. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ5AB2121465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c20069cc14d66090f56df05ca22707e1084d8727eb9c21ead19d0c141229cd. 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/USA2P1947753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689d05ddd723d82248bc2613b2a7185e2d3a0ec59c649ae1bbc0dd61f1c8965b. 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/QZW9M2282578.