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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e8e7678dcf7d7862dbfc37d308f1b96536fbb45e18529448e7c3c848b1a54c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de4db712-d35a-40a9-af90-f2b4ff79e9fb.json and https://artists.proofprofile.net/proofs/artist/de4db712-d35a-40a9-af90-f2b4ff79e9fb.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d53e6eee80f156fb6e5327d7dee3f8f8be4b309966171b3e18b56d822009dc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BXAWU1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20919dbb6354637a123adcdbad81838106959e6cc7fc2b16a39d88fa43d7b4dd. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/BXAWU1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab4e2585d927c32611e0ef2c0ecde95a02b835a2475119021187f5c71414e4c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BXAWU1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc853d1a3ecbabaf762f94bd6b507ad61e6c91c5038aa6c2390a6e4b3ac3855a9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BXAWU1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed7155f8b3176c8b7f48e2ce4c833e6c7cdc0c5f2c6be8fb0158d90dfb16fe1. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/BXAWU1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf45a49bd9b2e65119ed005b4940f1040b7df558df27e9ce2c4c313e9e2f2ef. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BXAWU1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e776f458384dfd15f1d5052703389c7ff736d99786cc331f4b8faa78a498020. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BXAWU1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34cd8c13f8152f081224a55680d6ac49d350cc350f3ea84b2ff2bfd66f30a61. 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/BXAWU1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f5bc477ea0c47db2db85fcd7c7b8080486edbaae5d6a1415d91eaecf0fbe2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BXAWU2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246f7a45d662d331182b35e122639b8eaf5cdd960b69cf5fed7442e2db7e64d0. 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/BXAWU2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4072a53238f251a3df58d5d0e20a9f17e4ff57be05abd8b2b111b371b479e0b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BXAWU2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd2f000ca90523143135d5a9a6e75951c93d0b4f8e8246846bf862414d6631. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BXAWU2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4267768e0d462fb35eb43b9ea32b9cd1a549592810fec4f3ee0ddfaabd27ecb4. 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/BXAWU2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a6ab78f436a2e3767e8411ff3e72442dd22503129122b4095d046c2322a40. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BXAWU2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3fb6e0608e5afa0063b0ed6e5f753661301b41f4525d0f8c09f25f5f65c633. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BXAWU2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b216bcf6aabc3ffb4f0b25ef2a7abcb13c0ac524cb73c902b5371c04742bf. 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/BXAWU1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318e3e34c55a0c30d49fd9d43a64ce8f38a18a44f08f246d60bf31855ecba996. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/BXAWU2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efde7feb700bbd30df43b36cc70a727f6b9497259a3c10291fa13c0124d09cf. 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/BXAWU2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374bbff3a283e4bd4a950dc2c1521fdfc1d45a7ac3ab6fd092c214523fed0c83. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BXAWU2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac1c86daacd2f400409cea32fbdde27220902e1f4f8c6be85894fe43951929d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BXAWU2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd4a2094c1607f9af55fc77c66caee225a716fa8a33849c4bd8d4405ba7cf53. 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/BXAWU2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda78bf36632dbfaf8ef8411b0c2655d41170fc24f16b607af9097893ab4d6ee. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/BXAWU2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eef8615f3c0486536773122c73217bd95a2b484d0f3073716c48d14fd564f3. 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/BXAWU2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2f7891a2ebd4e134f94e45b5ec8ca461d1ee95cb84fb39b238ef0262d9983. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BXAWU2400010.