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 0x70d7ecf0d1e8bc1baa3a1445450423c08f36be9d2bbda23580cab672dbc75d52. 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/53607256-8b09-4a46-b551-f433edbeb543.json and https://artists.proofprofile.net/proofs/artist/53607256-8b09-4a46-b551-f433edbeb543.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 0x21ce09f67438438a303e0fcf741543a42d7fdb3e916e8989a00364e001cc3f09. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6J2480256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c4fdd010beaef69d2ef7ea4ccbcad7b3a67b5c48aa2ac1f77e542118cc9dbd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB82447784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f0c2a1b659f02f57b6c42a2eef324e651e67e6b5830ecf3e48d770f8652f24. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZWFE2499680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575674ded1970c99ced17150a4f3e0aff361699def3c6d61bef4d82a55c75833. 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/QZWFP2458366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17356c363337d14d6ea9837760eaf421362b0be7fa18cd5c75d0f0b247c822de. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:38Z), 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/QZWFP2458367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeab0e3344e7dbf17bf8b1eef1562cc42e5c4bc8a4701344964fa116a5fe813. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZWFP2458368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a31840b81030860d66d7811bc6b057dc9da1427cd44cf1630ea1f290324800. 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/QZWFP2458369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35883914c74cf6ea88e6382f6f6029153e62d1b1f7a31fbdcee58c7fc4d61ffb. 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/QZWFP2458370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045eaeaace42fc3be07524038282803231cb21fe0820419111e6df5a03cd2c02. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USLD91773109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f2deb3e9aa699180fed5ccabf9e8331e3031c3b6e2112a165308ab9c113a7f. 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/USLD91773110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa092c9a38737d36d262604170d3f2f396f3f36028947229b92c549c0f6bf96. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USLD91773111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63ab05fa00123b6db658dce0c4db170e38a306295f1acdaa042347390bfe43. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USLD91773112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816b6ad9516a37165eb4d237fa3d6db16c7dfdd9e10fbb455fb08cdda1812210. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USLD91773113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb4d7ce325b70ed72f67a778482bfc1be8f432494f894196c33700d2aede97d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USLD91773114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847555a683e07e90769dba5d2d6ca88b3db06bff6e8d614850be6c0364b7233e. 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/USLD91773115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8aeffe3eb73a4f592827e9b10c28a7c5c48e43a7056521ee18cc7967f93afb. 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/USLD91773116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438de3f53d218efe26e833764301bdc6e5292a646a0ca22c9fa3cb1fa9b3140d. 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/USLD91773117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae889f564e1c1c78cc8dc4a31083f13fabc371bcbf92f9b235ee1b748062908. 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/USLD91773118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd4b6bb85e9b35fcd9b1ee69725534e0a1f59074e6f8acd821cdc3124ddacf. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USLD91773119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5687b9e718b6c8d6d5cd321f711aa0ba9e5017bebc5eb6d08dc30a305c76a17. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USLD91773120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b280f76417cc482db5bfeff29d6d3efe14293c2215c98682f600b3b9706bc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:34Z), 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/USLD91773121.