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 0x75739cd46f06ca45ba89b17cd2e363efcd209323f4eae0f78e30f75d7d9c0b39. 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/c2e4f04a-d0b4-46e5-8d13-f2769d7baba1.json and https://artists.proofprofile.net/proofs/artist/c2e4f04a-d0b4-46e5-8d13-f2769d7baba1.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 0x8d986ea4344e41ca9ee655e350df2d90b51135580aeb42fe51f6a309ca9ff647. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE5FV0800313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c051c0bb60cf83927df30d1c2f7352f32434a1d59ad0c71eadac3b37c0e790. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/SE5FV0900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee351e61cba2334dfdedc8b4469cd13f39ebf04930a41e87373cf97dbde0164f. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/SE5FV0900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3069956c14691e887fbbfec973ffa541b7a9e70c464e3cd68d9af6683bca9bb3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEM071112013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb538ce9778d5f91e57289f3c249eba7dfcc2645f76d97518d66655a6f1fa2688. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/DEM071112014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e053718ea5d888376945d679b3b303db87b701c9dda6e0e1e50960a6500ac34. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEM071112016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf835920895f6b4870d9b908ed7d04fa55da6f90433ebb8ac617b80d2d6c10763. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:04Z), 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/DEM071112020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb58f270c8342ec5854a829df73dd143429ff8de6de0dfef091daab5475cd68. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEM071112023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6052e47152ca2adf0d90a92eaf04a67cf874da8a2435aa0516a5acaca97131a4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEM071112024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2126d5e3364e945d3ee086e951fda5285ec75740ecde8745b5d263bc85b54be1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEM071300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c8433c29fb8efadb8c8e96981af84e9a1b85e8efee54acf381557b9c3a6d1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEM071300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1fdefbc22e7402c20aec5a78447d9fc28d77aa1659b0e7df81cae65e132dd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEM071300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c67246273710b28b01de86c8c55b360169be75d26adb48d23168a93fff199be. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEM071300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1b91c70384d8d0a5748c980e06b44d9b5553401f8bb6bf653277dfe472ac7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEVSZ2004002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc889cba0274f47064f94da348359abce36ce6b46e7b54885d7a348695bdb8d25. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEVSZ2004001.