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 0xffa9ade0b0820dca94630d94b5e7f5b6e39497eb3e1cbe29024028c9c98c957b. 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/9402937d-31f3-4b76-976d-c1c36f38e244.json and https://artists.proofprofile.net/proofs/artist/9402937d-31f3-4b76-976d-c1c36f38e244.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 0x1be01a710e62eed3816c7538a6cbcf2f6cda48fd85729cac6c451d131e05ca11. 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/EGA252205842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad8d02fc8a02f09550bbe7997082818da3edc61820284ada1fa9de6434195c4. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/EGA252207664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650fc28a6a07a82c7a9672c0500a80de6dfe39821910c9b4bf56a30222356be4. 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/EGA252208270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc574b76b6fdd387ce82410c96bbe6bcd1596a45451b4743a5ef9dbc436cd6526. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:19Z), 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/EGA252209545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f45c568f3ba034473db94540ed3d8cfcd490ee98e621aa518846c8601b2f57. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA252210457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bda89c013f8a0cb65d8d43a38498b6672f0d760d76830fff86cde84b83c2efd. 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/EGA252211438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb184ab8c3bffd4f89386424e16b20c27c37a9d57db614fea7c7ce5f73d1447c5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA252211698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe614040070a60dfa206abe241de917df479cc6450019d7624c3170ddf780014. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/EGA252212525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd8ef6a292aed2a0a2ecdcc1ab936eec20c6575a61ede3e5d517dbf4509a44. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/EGA252300832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e72ae0915ac274be7b78de4cbaf413f8112d74727d5a5d3c2228124749a0cc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:28Z), 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/EGA252304189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3a61c5b3488af14e19f5010025e15af11e46f3eef2571d8982d4a09c0cd1fc. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/EGA252401838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aac776a95d2c7761057b1f36a9477f1b7a1373c95935b8f607a601f41c4fcc0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/EGA252401839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a539ca8c8a3058236b13c66b387fbba12438c51032d4b926d3317f77b86cb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA252401842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0f8d53be99443224dbc4844ee96b69968f2db2f4e9f27d51634e616f6aefd9. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/EGA252401843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558bd8a14944c3459493fb5d0c5bae5856cbfa7b68009877ec9c4278e6a93bf0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/EGA252401840.