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 0x04328eb34e7aecf37b39f73ac8008364707d62278cd8d8b1829d279db554b09a. 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/57ad99ed-7540-4521-9e33-7206c257b3c4.json and https://artists.proofprofile.net/proofs/artist/57ad99ed-7540-4521-9e33-7206c257b3c4.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 0xcd008caf91dd53bc4b19c03867d39b04ff344b62c2df2d51adfe2ccb08f8f055. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GXD7G2526256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74464763611851897dd7f46f84cffdfc73a4a863eed1d89e0a802eaa99cd3e38. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXD7G2500959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aede6642c77bed84d47003908d6e2b3f227c22c47aa28db1e1a2292804e89ab. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GXD7G2523802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c7d44fe5a21dd3b2a8734cee526d70107fc0b14619a6b48fccc85bf967ae3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GXD7G2517573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca551f038958f31dbfc73edc448c2420d8023d717dc8ed6db11e2d81ab6901df. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXD7G2514431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94741b2d8e4c824b45ebe757cb9d5ec54845575eb551d08b7d8d82c4eff3b0ea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXD7G2530397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2682ca9e22937c5113b5723147de9c74abf3b121a653f30c528604026f191891. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GXD7G2545425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b0587e3e43c3ddd3ead72e0f0ca2d0c8b4799e09244c0e130a4fa6cd9c2004. 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/GXD7G2509201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd2fce020e0172031f7518dbe3c001e7c70cc2e11d63a8358cba51e242d13e7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXD7G2583193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e270321a5b8d94ae86d7887dcb1ea27c151432943759ca7fef7d6c48c38523d. 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/GXD7G2504702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb7df518f0e7fc6c643c99437a5e822bf6589cb0f23d3fea3e6bde57642ff2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBAV2027204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff2fb21a793537ae14594614e1de57eb771f3c226cc3fe7bbc99189537fc4f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2092410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d011f9eaf0b9dcf56a5ffd932c9bffc794b50eb49abf3a72039d9ed4a7689. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GXBAV2044445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e44357a8b49cfd643e5091b13dfa10b9a5779e2858eb1042818da744c44d5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXBAV2004450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b11c321ebc5a87355f45a46836424f490cf12d4c04c0ed464408806295cf37. 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/GXBAV2052625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659548cbb2fd4955f6cb590d2bcbac5670e92e3557283fd74402549acff4b5c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT5M42522981.