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 0xdcc9a646db1dc91be5bfd30fcb398c168274f6a8409973cc685c5aab7e4bf625. 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/0bc33a7e-9d28-45a3-996d-195bae72ef38.json and https://artists.proofprofile.net/proofs/artist/0bc33a7e-9d28-45a3-996d-195bae72ef38.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 0xc20ae813a71b994ebfffd27c1e7da2597a39b65852089341679cd45cab5bbe2d. 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/FIBAR1600643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17bb86ba6bcd200d41f0807fc92f54dd5e093bd50f4bf81b6274b0f59faabe9. 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/FIBAR1700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3523e9d8c427c210e9adbbca196260dca4ba787c091d39662ef9ccf83cfa5f. 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/FIBAR1700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f25f9376314cc158b8af8ae2bb5c3c84714066ee1a899db6c56369601b4244. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIBAR1700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059f13932af59bb5acff607e82a637cc76b1516411a2f851a710025356a116c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/FIBAR1700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f25f9376314cc158b8af8ae2bb5c3c84714066ee1a899db6c56369601b4244. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FIBAR1700316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5059f13932af59bb5acff607e82a637cc76b1516411a2f851a710025356a116c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FIBAR1700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928e6bccab9f4beda2f0ec2faa85a64ba138ee45071d8ebdcb7211fb25c2695. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FIBAR1700356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3523e9d8c427c210e9adbbca196260dca4ba787c091d39662ef9ccf83cfa5f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIBAR1700131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f2d6b81005ff6158d43abeeb79ae1ce7a6ed5baf8d90dc6946008fcbc03a8. 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/FIBAR1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ad6941bdd0f869976ad8c5579d5fdfd503edd44be713e088073984629c2de. 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/FIBAR1800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15f86e2b03051a69cd4d1df22a7dcd94039ff1c6f046ea9531aafcf448c2f3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FIBAR1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317c949c3acd329092a452e19f95a9301ba62caee5d150bcc23e4802122d192. 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/FIBAR1900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1f2d6b81005ff6158d43abeeb79ae1ce7a6ed5baf8d90dc6946008fcbc03a8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FIBAR1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317c949c3acd329092a452e19f95a9301ba62caee5d150bcc23e4802122d192. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FIBAR1900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55577c024fec4375d80570982e488b21efa1b061976a44cb9a745a7488c14ee. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FIBAR2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0ad6941bdd0f869976ad8c5579d5fdfd503edd44be713e088073984629c2de. 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/FIBAR1800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbadcdad04eb89ea4f8b8545900f3adccbc859627af5a4ebfd3be6f6b884b3c4. 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/FIBAR2100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab85cf439a94db95a06214ba3016b7226aee5124fa377a1e13dfd9ceadc4ca6d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIBAR2100224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8056dcc7321a9ea05f5f3f3dcb17f7b44224e30c405a18ec7a8ce51354c4e2cb. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FIBAR2100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf40ba33c7c76b590e3049f0db1c9170d0c1cf5c469a210c75de78111f2de54. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/FIBAR2100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0688210a6a906e0a4d41fc99a67a40ff1959ac2929da68935518614e81fb1dff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FIBAR2300446.