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 0xc835c2a71922ab1277f9506859ed702051872a26b56ad0e91c097f89640f1c3f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28bd46f8-8a16-48d4-a1e5-f986582040d9.json and https://artists.proofprofile.net/proofs/artist/28bd46f8-8a16-48d4-a1e5-f986582040d9.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 0x2cba941ab716326096d98dd7592781d54c0e651fe5d0af1d127bd57f40300c9f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6XW2406098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3c5bbd19ba250c7531d0e5361383f7bc5924721c65660da44fadac73c8f717. 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/SE6XW2406099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4955304233690c8938d9b3095f24213f5d0e3f8b25e544835c1bb7bbee69cea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:08:54Z), 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/SE6XW2406100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae88c26171059aaf3b65fdb2408ab95321c122256ffaa34fa2b4311d2b6ffec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:56Z), 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/SE6XW2406101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3758865f28f1a9d5ac9f4cebbfe4dd3b74b66a4d48497fa53c05399521a3bf1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:54Z), 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/SE6XW2406102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12821d4fd043092d28d7519d841a580eeb5b717243e00902c6f35eac82bcd3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:59:52Z), 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/SE6XW2406103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fc387d01fe9b98b4d39a69cb009a4d44422104bcef6b53ce4e6e9154cab69. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:36Z), 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/SE6XW2406104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae19e34b86c3a8cc6ab5404b8ca9bcbf1282163c28534438d8bc0970462c4a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/SE6XW2406105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9392458e8a5a51cde0d942cbdb3252401504c11b4aad916e02128d7a8c5f80. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:36:33Z), 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/SE6XW2406106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6428f55530194ce0570d473a3c039d743bcd3ff1153feac29b2903eb42ce63. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE6XW2406107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b539e5702515d461fbe4c3090463a3a18573c604460c0f04db0e45b1f3ca3c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:58Z), 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/SE6XW2406108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39d5d7cc314ef79bc3fafbb9620263bf9e1cf0c66092519d8649dc2ed36ff59. 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/SE6XW2406109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7955eb4bb9b3fa536d535340acd974e0d119b68441a04d14d420f909b26e62bb. 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/SE6XW2406110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30726691f7683fda8d8c61d8308995cea25e99fe5c5181cc831338f7a76580ca. 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/SE6XW2406111.