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 0x0624f525b3c7bb9ac00f2e2716a49e0a81330dbea389bed8cd18c61b2226353d. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8edf7ffd-208f-4d23-ba8e-6845f169eb37.json and https://artists.proofprofile.net/proofs/artist/8edf7ffd-208f-4d23-ba8e-6845f169eb37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Original Banda El Limón de Salvador Lizárraga
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 0xc47bfec7ed49e97b5270ae5ed85b44a39f5642d1cdad366ff240e9da05d21ce7. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USUTV1700659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904c2c85d3cc389a572bd43e59135d2de52291c229ba54fc61db54a3d2640db6. 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/USUTV1700689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d788d82837d73d30fb6f95eacebd4f3c55be7adecc275387d63eddc218c661. 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/USUTV1700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d00a038b80b836f0b2204c5bbbc0e1cac8d03a3d0872ba5f2438b0e3f44161. 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/USUTV1700661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86cb414f7597b7fc2db9832ff7ea021500bd29b773dde2a08c1ca407deb1d97. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USUTV1700662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a87c0624bc1de353fa24c43b0cb3f9b2bbc4b666e7564f5ebc6d3102ab6a1cd. 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/USUTV1700663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e6493641863ffbfc3ab8ddbf9a27f7e1f68d2dda335c1a2e38b2e0205dfb08. 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/USUTV1700664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b468525b58506cefbce074854e598f40286bab35ac47041407233d96f94e689. 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/USUTV1700665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5402baba8c584a6bb72a8d95cbaa50e28cf4e3b2843101069ab33f2f600ee18. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USUTV1700666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a21f812e7c1e3fa04681386ec5f112db28d4d36877a64f4185672a7402a2956. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUTV1700667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81042958bbd0b20fe32820ee19e8adb02df153399942f4dcfda932ed24e087. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USUTV1700690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a49e60f4d0615753e57f24b862f201af7a36ea5c64196c616fd550bb514220. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USUTV1700691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efe475af0903a1e5ff85079ff5217862f779380b0c1c66a464dde9ab60f2fd8. 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/USUTV1700692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc86e0e53439537e56f1f4fd502157163f79f63faff60f8188bd5841843ca2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUTV1700668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c2e2478df005a6582837299d7f2e955fcc2ef694e1b1926604fde376e7c23b. 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/USUTV1700669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892d85258391b372407622b20604d3037634b1c09115c2c84015a03bf23fb96e. 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/USUTV1700670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4bcfc19cb56752bee64cefdbf275c40d88d89877f90abcd0e0e025678f64a2. 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/USUTV1700671.