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 0x89d54ad1ec38e392bc2c639423df55a786d9e1d74a9a8dbdbbafafd271c558ee. 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/33faed59-8325-4031-bab5-733b71b9a632.json and https://artists.proofprofile.net/proofs/artist/33faed59-8325-4031-bab5-733b71b9a632.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 0x2d8d4599a79c2ebb190f3c42eb62ea4fb6ce4d7f7d558e7ee082ef15431b16f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCABT1432857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950db37f08bfae7411d4d44f6cb674f236c369ab101525378f53654ff133480a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCABT1432858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5f71ba7fbec74cf582e89dc8a90aa0175e82e561c6e510023ed450834c3a90. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCABT1432860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8cca1aaeec18c1958695f219f9a8e0b3afb74476bf4a4292797a6c6306ffa7. 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/TCABT1432863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c299a3096040059034aad251e74495f1887d4df392883714c28a1a63a7d7ce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCABT1432864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c8729d42d4ccb2bacd4b4f2a6f1431487209fc2bb409c8811d08ddd838fa6d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:46:56Z), 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/TCABT1432865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe08abda38d2736ac870670dd797afe1d65b2856b35d26f2bb90b2d252c34d54. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:34:00Z), 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/TCABT1432866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c756f5c40a69911a4ccebb07572f00add4ad84bc3438d71dbf98f91eb414615. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCADM1823884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3a6be86e8165f5d0e87c1412d06aa5fae2dec51e612de9a5174d6803b156ef. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAEF1902272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0923c875060fa28e4a800303b3527bf9492c7727d0a2e45e7872af20e0e32354. 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/QMXEH1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f9f5a775e7ff69e863e2b892afcd13cfd7ab2ad9e7e71957eaf5a41a2c6f6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFW92100268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc013069f764961254ce85e9098a75898b72b47ae78f198f0f4ecd8d0b6fa16d1. 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/QMFW92100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dd45d1ef44bc69b6536b6c096cff71f06398610832f663c2202e4fefe8d368. 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/QT24H0000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ec44ec6f2f572dd6d5100c54c770e7a7b7539059ca91dbd6c30c9baa4616db. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:23Z), 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/QT24H0000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1dbdba2721c48ab3379c7c892a25eb20f4b54141be685174e9e772ed59f14. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT24H0000181.