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 0xab2682216ae3e7fa13f4fa9cddf40b85f5edb01ea1c0817794ca453131c1db93. 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/745272f5-9c3b-4409-b185-adc7401878af.json and https://artists.proofprofile.net/proofs/artist/745272f5-9c3b-4409-b185-adc7401878af.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 0x3eb2b3ad3af5aaf673fbc40a16a89b112e2134b82eac3a201f31f11fd2dcf35f. 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/AEA3A2335005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8736ce07dba0d2701eb969c1f90ef5d15d7a435a3b83841c29057979ce958eea. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AEA3A2363358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28a2064b6f0adbab878919798a05f008482c26214f7194dc7a23ae2332b2127. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/AEA3A2252963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9069f03e601c62d7d426c25a952ea7947b62ba8730a3425504d084421f77f3b8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/AEA3A2270732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0495cc8b4c4343345bc713a6b4205291d80bc2ca313ebd2a805a92d2b92819. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AEA3A2239811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed703ad5e4c35b4a55abed92aa6f9144c7d2e389fd9e71a274ca0701e4d9d3eb. 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/AEA3A2283587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9003a67bf78c7c38be2da9e9a0be3d7cd22b57867f250e903118e88ad6d7af38. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AEA3A2226124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab9def459f65b969c6069c397e2417275a40879548e48d0b847465a4207f935. 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/AEA3A2221976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215ddf6992e376f8f072d84d765902ac907326a2e217872adefd25b59be0eb1c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:58:27Z), 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/AEA3A2216630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c539d752a1125aba050c3826e6ebc2202e938c2815f36981314d83eb7129123. 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/AEA3A2224901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc71d1ee27d63ddc7da5990956431d3d77efc7a28a0bb56243ed4b2e176d4410. 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/AEA3A2276098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd5cffc4d8d36e7265c43274f838d1357c8844a430c91d1d0a159b753216b5a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/AEA3A2251155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff41323765069d03922ec016cee99a92aa0ecfa9a360813a79638859ab9d7001. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXD7G2522750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e13dbe63456628b865c74fad389664e496bc0282b5106a63cb890c14b442bc1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GXD7G2552934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58de96715621e4693534b4444da2f00fa47df6bdd27e58fc4a4c2e1d6bb0065a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXD7G2587633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c7bec1dd6f8d2cc48d1819393185854ca7d62673d79a110bec54e4eb501482. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:36:39Z), 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/GXD7G2535434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74bc559b73e88cccab009875f110ad13be7fd86993a39b92dedc31036e1f5f5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:46Z), 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/GXD7G2516727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39316a64f8513dc587d2ab924909c736a259a13a05b5b620f7d1cdbd6384584. 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/GXD7G2542051.