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 0x85889209d34cd96a2bc7ce225da7c6186b7842105f2bc497d44813f2afaf94e9. 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/477a38bf-6973-456c-9f7b-b7b2f861390b.json and https://artists.proofprofile.net/proofs/artist/477a38bf-6973-456c-9f7b-b7b2f861390b.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 0xa9fd28a44e245e35881c04905e537ce665dc5a7f0f6f62350dddd6cbb772326c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGJ2587761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b55c76303bb911ce10af7a56ba24d73b00b534a2f0df203faa59590eafd16. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/USCGJ2587762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90449114d499bed1ddb293672ac2d7fb8a2d383a2ba135bc1956ce82ba1cefe5. 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/USCGJ2587763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450685272284d593a4b7467165cfe0cd53221034e42ae22cf734f3c73c6e502f. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USCGJ2589885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f01a8875b4fc0e01ccc14ae3a1dacf11c198bcec948734dcbe38f1a433cfd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USCGJ2589886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa513a3335699bbe0ec8456b0d457bf64270862b6d7d048d9c2d3722e199aab. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USCGJ2589887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9105198a5e5974d9333c4bc1e070e299ef251ccfbf226226c2f2937feb9d3652. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USCGJ2589888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f021ce5c1eb14678982520bd3b826cbce528ebeccb2dbf022267a4d573c4528. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USCGJ2589889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc81b089e19338fdc473e736ae1939396494213370789ea4e345704b1b934a. 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/USDY42551921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ddfbc4637a55515d43b17a7f1e46c67a9f45e15dc20368545daf78f6e238fb. 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/SE6XX2535247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f09925bf983872c933ea97e437242441df124d3794b5345771b7211048fa1. 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/SE6XX2535248.
SOLTO NUNCA (Super Slowed) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d604cc68c068ea42a3d86b1ad87894544fc1141047b1629655d67fecc512179. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6XX2535249.
SOLTO NUNCA (Over Slowed) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d7a71cbce0c4031cd86fed038e2f3460266038b94bdc90cd4228a054844bc0. 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/SE6XX2535250.
SOLTO NUNCA (Ultra Slowed) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066aaa1289751a82b179ed61d26157c8ef764fac20059af765f57dc82e93cef3. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SE6XX2535251.
SOLTO NUNCA (Extreme Slowed) - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe76d92976399c8c9edca2865ede6747b2e9465effd5406b8e6c631aac017fb6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/SE6XX2535252.