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 0x1e58dc075608c525cd9bf8e130a12b1aeb2cd88616e58ca282e307741793b606. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17ac601c-5862-45b3-b9ee-2ccb4f7fa3d2.json and https://artists.proofprofile.net/proofs/artist/17ac601c-5862-45b3-b9ee-2ccb4f7fa3d2.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 0xfd225b564549bdc3720d11e4590fca50a86912fa86ddeaf4d12cfe9d9e0a36b5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR9Z62100565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd225b564549bdc3720d11e4590fca50a86912fa86ddeaf4d12cfe9d9e0a36b5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR9Z62100565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7752df8c186fe9fd042d6acd7ea6da9e6f1cb7301af4c044fc38ffebc832b945. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR9Z62100566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686e4f774d80817b20e7f1b5ef0f520d81546ee383877db6d159397fdc914c18. 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/FR9Z62100569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4529f668fce4334996774ea7b5f2bb286bee4f6c41de075cf9c1cddbd4cbfa5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2218053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0df5b62563f28960c11f753857af24a046c15c007e5060a0893bc5c506917e0. 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/FR9Z62100838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a22e453e6af261b499c38aff0033dd36d7efc0fe9502f0113ae26c12f2308d7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEZC62280952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8b4321c79f1e86b11513d92832ee04d8cd041b1e034fe783ba6e92d2920ed. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62280960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ff4bf2c48dd60d5b850acff8672aaf7421e6cf304878728066dde2a783e18. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEZC62319056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe09ebf1e8499160269d4d480161274a38b246a9a660da48c07b9b117497cc77. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/FR9Z62300430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313d546d21d7fd8c65647df42cbdd55fcf5c9d81037233a826cbd7aedc034042. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:57:33Z), 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/FR9Z62300431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641367660c11bfa3a31fc63c7bfd9700cef67165f67f8cfbb62487e5b101c0f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR9Z62300432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ca8b3178c300e90808e6eed506d2040846d6c325b40fd71e2f20b83ee9d161. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9Z62400677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e54202fe92188e32f7b9d4a3e6f506d153659321ea32b35405d6c6eb1baab1f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR9Z62400679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7863db06bfd88fd45c59bd7e6e671769e674bc3ee9cad1910631f085ba4f40c2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR9Z62400681.