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 0x785e1130f97b533d4ac7f8d08f5804eeec20b08005acc5c1f7286522c05a9e01. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc649df8-4a33-41d7-98b0-75cc81564704.json and https://artists.proofprofile.net/proofs/artist/dc649df8-4a33-41d7-98b0-75cc81564704.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 0x2443f69e294756f4b1536f2a90b8e6525622030ff4c54cab4d2dfd9dfe5c2fa6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2240890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda96a9115542f2854b6b2f4d9aa5caa6b4a45358493a794df60502e0647b5040. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US3DF2240891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f604bbecf72886c2382668723734c98db14f56e8d828e3ffef8170995adaa7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US3DF2240892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9fb682dd5596d3bf517856c166340124fd7a3a6d236507ebd2159f5458c701. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/US3DF2240893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de748e99f53926cae99c17188acdae75ccfa619682481e766134601ab97b1fd. 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/US3DF2240894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a39f481066f40cb6061a2258bb872ce02af61424ccf5331f317f7b19664e145. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:20Z), 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/US3DF2240896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c25e4582d36d9b6a5b407c87cecb8ab5e30ceb13fb375b929349f3163761e3. 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/US3DF2240897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d472374cc1176711bb0503409ac6ef8e46413cbcf4e01ad893726c51d214fe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:12:53Z), 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/US3DF2240898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568ef1f860c9d2e50c1ab7e1703c3f23c491d1f420303e072f2d996cfa95c32d. 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/US3DF2240899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f0412f1e8f414311b8a5c1ee16596b1bb116c23850b01e6e599fd0ea01e253. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNJW2315119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c37f5d8c251636608b759de42d9046a37b1a9a6ca44de5d1318230abc966189. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:09Z), 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/QZNJW2315121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ff678a36a4daada5a8c704f5353503612820fe2134596eef22c09f4eaf827b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNJW2315122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630d69d13efb43c8bfac36fc6b6bc4e298e108ed663bace65165493ba0190bee. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJW2315128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a2e3414d0744863279d013bed0b229bd6bf227617422e45a9acb681b8fc3d4. 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/PEPA51711013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7867578e6e4907f6079bd7c1bee92b62b5b0d4dbc2045a4a3969c345b50e6f1. 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/PEPA51711022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403c8dd2c38f252b12683f885070e153393b0036abf4f1a6a2e27df773bc66e8. 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/PEPA51806163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbba6cb1a45dae377617909c00cff4ed5c3be0625aeb69b631e93ea8042188e. 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/PEPA51806169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7425fffbe244820895cda1efcbb5d4d4671ac6b0ad5bd62ae7327431aabce3d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PEPA51806170.