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 0x0a62319212b714ad255740675c3e2285ea3ecac89ddc1758061812ea39e9bcee. 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/bd070e84-43d1-4ddf-8acd-75ad0f5a3618.json and https://artists.proofprofile.net/proofs/artist/bd070e84-43d1-4ddf-8acd-75ad0f5a3618.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 0x68f73d3fd758fde3f52a8431646eb777b0f4db1d58bb18737a8203abdbdafbb2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZHN42143597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8d5e7f2af8a278eab4eb77c2f7ea78460563f6f85e06127d24d44f63fc3d3a. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZTAS2100719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d441da542b56f4b1188e80095dea9e3652dc2947f00dc77a4b84fdc9773df87. 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/QZTB42210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cdcbd0f0d09e2e61edc28144ac4d06247998f8194b729b895f7c9be9116261. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZFZ22386412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d441da542b56f4b1188e80095dea9e3652dc2947f00dc77a4b84fdc9773df87. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB42210001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9206181547302332bb4039ced343f0e865c4194ea2e3ad55e03126d3b280943. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZK6K2390736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c958f68d18c9d9b65cf0e8a44c85e00217bd0083c323de026a6dbe414cf703. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/QZHN72399049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c18b2e533b0e73e787773bb76245dd056fda304d1601dd03cfe4877811cf396. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6K2390739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec159b07c2247aa49a18bec00ea54714b9f7ebe8aee5a83dec1a760a336ce0af. 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/QZK6K2388906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c958f68d18c9d9b65cf0e8a44c85e00217bd0083c323de026a6dbe414cf703. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN72399049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500acf20bc33c7ade14f54d5d0b70850ab95c827c97db3558cdd511483c7bed. 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/QZK6K2390738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ab7ba94d0fa03208760eb1ef3357bf997a1687974ae6ceb768f20ec684398. 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/QZHN62447590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e49a1a6803e4e1e002596cb7df6273854fa26cb90a07c3993299ae5982f503e. 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/QZFZ32431040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004fbaf01733fd9528717311f651dd6009a81b5a98d0f7d69faa729a019c1835. 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/QZHN62447593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc819b18002745d781fca0d5d5dbbcc70d0a219f35e90acec2c7feb7987aebc96. 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/QZHN62447594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f49c0c69008ab6881f39c0ba418322f4a66f23c0a5ebd904636b6f59d7a1b28. 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/QZHN62447595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791e8766fcf2606a3d3d058fcc7bbf8aff8ff6a213f932c260038786908d004. 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/QZHN62447596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9ab7ba94d0fa03208760eb1ef3357bf997a1687974ae6ceb768f20ec684398. 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/QZHN62447590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc819b18002745d781fca0d5d5dbbcc70d0a219f35e90acec2c7feb7987aebc96. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62447594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f49c0c69008ab6881f39c0ba418322f4a66f23c0a5ebd904636b6f59d7a1b28. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62447595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a05b6a6d95ec77783b63b867b7ae19d5458d031e43616bc9536d48b1cfd57b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRR642500960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf266f1fa1f48cf2c8dc67b937fe60d89781a38a841d8437baf882ea0164fccec. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/FRR642500972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f971949a5d6fa26dd4a86f622207fd2f33ebd4e7d90792788e5a16c72e997b. 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/FRR642500978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba15c956173df22ee7a838b1c96039b8bfde348e9177dca5e1c1fcaac3aaa07. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/FRR642500979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49d7e13539b2258b4e6b7d0c724ed4c55a77cb90efabb2b4ddba299168ca44. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRR642500980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f213fd02b15cb80f2fbb4bf807626a3576f2e8822e58e92457f3c828d57cb1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRR642500981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8fe88055413bb13d523b92c3c5b2c7623b9c216bcb39d576c2f5e4043aacb9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRR642500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381dd8ad0d8d4335cafe20b3c30fba4d3e8f9a2eb72a61fe640e6c8207631262. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRR642500982.