thumb|Credo III in The Liber Usualis thumb|An example: the autograph first page of the (the Credo) from Johann Sebastian Bach's Mass in B minor In Christian liturgy, the credo (; Latin for "I belie
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 0xdf12c7ce72b3ef3a3bdcfa4ec5bbc8e4586e61dc5716fac5396ccc279a9e5fa6. 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/ab94e349-23f5-4f74-9700-31dfc5ea54cb.json and https://artists.proofprofile.net/proofs/artist/ab94e349-23f5-4f74-9700-31dfc5ea54cb.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 0x934fc47c47ccde844f9fb3e0d06d9bd2ddbb57edde4f0f963cf2468a2a6735b8. 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/LVA100200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1316c98bb025f7cbefe7893b003b9687622fe0508fb2d91ed7ebb43bf27093. 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/LVA100200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2654a654816c2e42fef0a07187fd84f2edd15ac1496d5f4cf549682e0886c4. 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/LVA100200134.
Turies! (Credo 25 gadu jubilejas albums)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317cc696e878ec0c3e4061b28acb6aaed74b84737df7ee1563f7052db4cd2ddb. 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/LVA109700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0823e153026bb501b275c3401563ec8fb1270be2929dd2dc33d6bf5bcfe7ac5b. 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/LVA109700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d33c59b6a6d82a9b09488691ac305a15b10526ab17f035e3cc98e51cc45298. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/LVA109700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb1da6e32c1a65d93b8e5d32a6f74e331388a1a030b816c5ad65bb6c843466. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/LVA109700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fba56d80f7a6ca8e7c1199993cc6fdc8edc3f8ccf97bedec09a9fa9a6d44e48. 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/LVA109700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd6bf2fc4db40e65548fc8473de69080f6ed4bb17ea8df57ab65ad1ded95ce3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LVA100200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4842cc2e28878edbde17bb45ffa20be9ff458b15453f23d0ba0777bcf4607f1. 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/LVA100200121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1316c98bb025f7cbefe7893b003b9687622fe0508fb2d91ed7ebb43bf27093. 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/LVA100200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d33c59b6a6d82a9b09488691ac305a15b10526ab17f035e3cc98e51cc45298. 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/LVA109700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666281624ae8b6739a6302992151826ddfdf3a692811d2961400cb29cd4a192a. 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/QM6P41401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92beaf3e46c8cbe6318e8ce2170f3eec926fd6bd5662b2f4548c3448f6bf3d30. 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/QM4TW1663101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfba65aa7e8df6cb5a4dbcd53b27ca41c9bc36ee270845f652d5ecb3651b0d1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:30:16Z), 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/QM6P41405532.