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 0x43d0929e176eb342d4d47a91158c2d1dc6d885fdddf84dbcd4e76d2347659a81. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b700363a-3a39-4831-9012-6e303089f377.json and https://artists.proofprofile.net/proofs/artist/b700363a-3a39-4831-9012-6e303089f377.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 0x6e09765dfd0df2990de590e79718a4f3e7d5818171bac0f805ef3b825e177552. 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/MX4972302322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7608ed13cb999070686a7d5341c14f7576897cb83640ae772a8967265e8b797c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/MX4972302325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a66c10b8ad893a68a7ffce33bafe940f6b5a0357b1f01747507c209490b14a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX4972302339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5eefc74ec148edf0a892a8f90c8483c4927ca1ba8e72354fc09b0684682e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX4972302329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c1eb3ab4bc587ea1fb8222dfc55c749aec7349f3145ddf072b9a76013f6d82. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USMH92346471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41e1b4f5e9fe2eaf3bed36fe9474596243aaaf44770ea01e96a57d85f201a1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMH92346476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f9305e51587951d16b60aa8e74d6b594b79ad5ceae5d0c2172eb483693438b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMH92346478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9583ccf56bf33ee7e864d77567b69426e0a1866ca42efe4346cd5e36104cd69. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USMH92346481.
Los Caballeros Del Rey Arturo En Busca Del Santo Grial (Rock Sinfónico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cbc7cb15f9693c7ba5d8aecac8997d04984fdadb4670780d41ca495e6ee3de. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX4972302095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d59fba21071288b90addac025681e9a3e463f85d11738eeb1d528b1b2befd0. 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/MX4972302111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c3c09734b5c260e9719fbe4dc06103c5f0c5eee190e0fad6035213c565e8d4. 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/USL4Q1820862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0842fe5bce8b46939e16f78183f4966d53e70b01755f23e77cd293aafd06b381. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM91856675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82d5746f360cdea2c3534a2febc4803f51ad9a2ead3ccd6fc676cc841713b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM81826900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4036cfbdef1ae6b942a9ec5cb5cb6ab78e72ea0f816e10f839d9a1665758d2. 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/USHM81826901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b32a0cda5ef6dd088d843089670a7320cf40c63a7928d6af3d3f34b72e6275d. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USHM81826902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aadfffee3a13a1d8225566222a73c2f431c4ed51251a7a97684b558a7f31c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USHM81826903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d343dcc005ae8089c59ffd1035e62b2d0f5a94459d8c427c0de84c0cbcad1. 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/USHM81826904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616062e13983c4b2e770159b31776c8f8a1c324a156d68387a270b5295194227. 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/USHM81826905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0d64cd3309a6ffdc8c33348a36751f79ba8eddcb2dabcf2ed7c033f1cee37e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81826906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2419490933ae6a9887439055dfce23b4f8cc6e30fc1a0ac6cbfbcbd030c8d4. 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/USHM81826907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed9d7978b60ffccb39801b1bae61673f7560295ff47ef7abeed16f0fa06ec23. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81826908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed4403b03a6949874e0a78303b820d88a4d5023ae59884264ac4c869ecc3fde. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM81826909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a5d27b345a0120cea5f18b813e71d946b00386bfea55f24559da34819e4105. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81826910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e6cb0da78e55eea1ed7058660bb5a596c4c63c4c242d8dcd42f934254f9179. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81826911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5585f37d7e724e76792a75000dc72157f656018b1bee79232314b74dda790f56. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM81826912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dd77f4432b7423aecff34c228a17d176581949c2f4dde2ee001c87f539b600. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81826914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dc740ca8e0e7a1f5e344720dc6d0603e02c5a2eaf3d98d4f85595af7883c71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82354403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115068f80debd7a03c5580204808f9a172cb4a2849eb9970ef7b1992387e3ef. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM82354404.