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 0x2b8f3cc0f3e2eb8e6b5ec2e84ea41d75aab926fca29b5b5a7c9ec25d1966ca07. 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/2feb38ca-0579-4d85-9941-7b402669b99a.json and https://artists.proofprofile.net/proofs/artist/2feb38ca-0579-4d85-9941-7b402669b99a.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 0x75327389c970dfcf7ab28d06126776866391e67364d38de70abdbff11561ea16. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITE261100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b48aa9be5ac1469051af1898c31ae19fb099114c092c52e3c2154305ef78a61. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITE261700026.
Canzone Registrata - Caroline e l'uomo nero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e5ca231aa319225d13e1f2ee8dfc5712cec09bf58526cd2f9a956c4f3744d. 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/ITE261700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9178e05934819f5900b86ee052535c219a7d5b0717b37040a10bd9dfa8cfcf. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITE261700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44938ed69de2c9e2d3935f25cacf4d3d5eaf7e0ee95d947e5b1555aea34d0794. 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/ITE261700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cf4bc5c2ec6229e69a6593fb4c8d1eca73b7652f37281f97214449a18a6411. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ITE261700024.
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 0x75add8c2dc1221e738eb006ff420f77d7061bc430eb58a789afb92092c313f79. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ITE261700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53af5ad6922e2045326f345d37bb2cd116a7040037dc18928c51593f4bee2b9c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ITE261700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790453b8d60ea36f10671597ac94b18e71519c30d5effc961f5f12aa0e580f57. 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/ITE261700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ab2430a0a0f7b6a08d01340529c6ceec7631b0051d3f2459245919d64b3a3a. 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/ITE261800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c1c0b63d36a839a5b4a75fc0fb30f937dd1c86329cf28a82268c516194c63b. 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/ITE261800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef38dab8b12769dd52ba608f0a00d85ff4b23d7d627ca02bcf93fce77af2638. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITE261800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a67938aef9f86e48500b44c3d8dadaee0bed6bf95aff1e3b159b4b4c6b6750. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITE261800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1272587edb729b23c63f2dfa1794fcba2a24941c1cdca211877be57fbc02a8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITE262000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b3b1c3a00fb11a454f6cbf2340b1a28ee239af11f7b2e8a10d28a4e09ac401. 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/ITE261200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab927c17a0b9d7062f06aebc0ab415d635a8b1f8f8ccfdb41a3d41ee21f98397. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITE261200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071c563f16656805855733d55eadd923bd4a9fb819fcf373a9a0f8e7fa4b829. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITE261200002.