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 0x8e0169fd380af0e2c58ca428b3564a16e61ba39389a65de48dc4e17a152a9302. 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/c14260a5-ffb6-4dd7-82c4-49c9f1cdc3ab.json and https://artists.proofprofile.net/proofs/artist/c14260a5-ffb6-4dd7-82c4-49c9f1cdc3ab.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 0x2f9e1375d788c8d316a1e961e8642159ade34826ff69e001ce6614a73e06a127. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZHZ31909373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c247893fe02a11ed0bd7008ad91dfa86701ad8311691e66f254f6e6b9043dc. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:18:42Z), 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/QZHZ31909374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaae4385dbdaad00c583e0f0db1f20e97b5c5bda4d76b5351346758e44e864fd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHZ31909376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f7eba7cdae2fdf7cd93fb00d9df9c79969a0e986d6a227a5bfe01081ded549. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ31909377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397592cf38c635de558249e449a140e3f0c20c2a4a7c7f3269c902c5441724b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHZ31909378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafd01c5bb4b52d5cc74ac7d3f5b0386d1d14d55cb74d45302b6f7eb9f84f23c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ31909381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7d2ea901f73d3fdde13e8a9db10b62d2aa2c6ef21171a309ac4e2ae4755a8. 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/QZHZ31909273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5cf88d9282d647ee805262e98b885efb2791220591849c1a99ba62a6820246. 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/QZHZ31909274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b30e5913b2da2e65456aa4a416063603d51dc542a1bb967f04f4e1c397d16. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZHZ31909275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c1e7c51aca95c0d56b378ae75b2bda851078c361255e6e5daa9148ee8c16b5. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZHZ31909320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1330bd1224f0f3bc683de8f27c91ebfbdc1eb99c4952a4a7c539dc37acea9e58. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHZ31909321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5614e55e84c4ea3338e5d9ee0fb12344eec95f96982e2136cce2ea33e0a695ce. 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/QZGLS1961052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19508111888ef3f89779b872a1b61b26f437a14f24892cbee49f9f8b9321b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS1961053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc045444812f59c04bf1de0abac9d8d1916602c6c44fc67ce06cc8077fadd3289. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS1961054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803d19953ebc69497a2282b6b688212f9394bde21468c3798f0aa68389e7d74. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS1961055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bdd72e428a26e8c9807b294e71e93c0923fc1feae5ac5b4fd11f2c3a21179e. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/DGA0M2490427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110036dccb0c16bdce1436adafcd3d10a2ba87b5305b994534ae12b08eeb5218. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJV2261300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b009d8c6d70e6ee016452b19f920270641d976b035e649d07d613f766df595e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNJY2235982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b96f26645fa9433ac72ba0efbb6f646a24c8039eaf268eae95cb455f5508d5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNJY2235984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48debb1f159e679f85984900898d599aee772e0a41a207c08618ef94f189b1b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJY2235986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee068cd28295dd2f769a9d89b1049f9dacbae9636e85011328fe0dacfd3512. 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/QZNJY2235989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf431278b93cceb3cd1fcc1ec62497c50ce44f775e1ae7e0d15ea6130a15ee2fc. 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/QZL5N2441114.