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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a823fc46aa36d7bf36f095f70e7b8d2b94435aac044fa6c8ca21cd058a7be40. 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/e621c3fa-feff-483d-a65f-3adec9154f60.json and https://artists.proofprofile.net/proofs/artist/e621c3fa-feff-483d-a65f-3adec9154f60.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f8378c690cfef277c07fdbe88acceaef7284ba32527b755ac2fd0fad631b73. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2019464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66356abc42e00942480fd32603c5efabdfee3bc9ed681aee004bb2d065104e69. 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/QZK6J2019465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe4d3fc2c68610bcce9db2298f535b8b404b942d2da6e3097575efc17d0db86. 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/QZK6J2019466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dab9c8c863b185f6702d2f2595b341b9ae464375cc12f83d3af645b066b7dfd. 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/QZK6J2019468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe61eb001b9f787e25364e2b1cb50a3587b6944ac2b134fb0d9e1568667e335. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6J2019469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf707866c637574e5ddf8cbc29dd63c8d6659e5d92d2e689efe95e8f5f4ffd4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:39:45Z), 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/QZK6J2019470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e496c609ffeb1b6e69860b97c7ddd5bc63a278b5cfd41bf4719538e22bcaf2a. 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/QZK6J2019471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee33c55c8e673caab3ae480bebe321ae48690c89831ed781174c3af292234f06. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2019472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199fc96d9dac1c46bce27796a6f6a0c1110b60b1a07e0946972094f2e7e2489c. 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/QZK6J2019473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ee5dc415372785cde1af16507b21b1e52841575484edd30b5235d5968d714. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZK6J2019474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54bf4ce998b515815a92c078915fded691d6047465f5960cd1a1a55b5bbc6bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6J2019477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484da4b2bde9ebd40e444235288c0745a93a4aaae9432b47b77be3a7200171d1. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:22:28Z), 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/QZK6J2019467.
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 0xb80f947a654d470f46eea1b4a5e3c28c04ff31ba62e08a0a1b7849bfe1b5e3e6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6J2019475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90bfc3288baea4518918d656f2cbaacdfa4b06082284bf167ccb3c29e23db1e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZK6J2019476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9546e63e5a81c17be42eb54d06c47fc61b9ff16351cb74d7181b2fddc417a2df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6N2359824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36fc2acc260953995f2dca01c17e7cdd4c5e79c8cf97f8230b3b654c9c3e96. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZQAY2487581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36fc2acc260953995f2dca01c17e7cdd4c5e79c8cf97f8230b3b654c9c3e96. 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/QZQAY2487581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0649f3b3aa9e09e8820b54642161aa731c9d7effc7fc7b0f47cc73fcc286aa4. 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/USUYG1383947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b656b32a10ddc549499d8afc3e2722b3b3584820bc3111c2e6cb03455c17b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6G2271357.