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 0x451e1245087e1f2811f50aa97a6305c3f90338e5fc8f4814c9dd5a9a70cbdba5. 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/0cd6f015-b6a1-45e9-a88a-b305f81d1be2.json and https://artists.proofprofile.net/proofs/artist/0cd6f015-b6a1-45e9-a88a-b305f81d1be2.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 0x079be455b79b36ad11e00539576a04412e37ef55a06f05e13d445ae273c112a9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM21961630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d602ada2b4b0c78505f167ad4080aa6974b9b2c7b198772246e48094c2a2de. 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/USHM21961632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0961210804ce784ee25fbd5041dc512e378496b69963e933ebba23a1dc227601. 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/USHM21961633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fafab6797ebb844845c0e491bbb34e2efbee4de526f1ab668b8ecd9cf74799. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USHM21933427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a369194bf7a33c8a00222a005307f86ecc1835b007dca32a6ec94427d84e796. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM21933428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27687922d4a33c9c4e47c00e9fad33e753f6056757a147477e360dac8dc01de2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/USHM21933429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0fdeab3fabbf3235a285f7c4948dce65626528975f6153b7dc4c1917f1afda. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USHM21933432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde01789276ead39c351ee07aef3c9d7da23bca9b47921550c4a85812c32db223. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USHM21933434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf370db76f7b2343b14703cb5f094f7763e11b3b4cac303286e03b9c30ce99b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USHM21933436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ba7864a39dad4b9a20734e165fcda5ad2f9e5bdc6b1e17a9e9a35600c4b54b. 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/USCGJ2001968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea95bb7010a47b25163ba5b6b88ae664998188432cee38a35442e7ad0594272. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:57Z), 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/USY242452814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef9074354f5b45c4dc866de9d29adb8cf4ea08313e860042b5f43399cd03f2a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:00Z), 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/QT3TB2401390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b19cca12434f14614699175792c97e5ee1947d7cf97b69d4ff40136f6e1707c. 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/QT3TB2401391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13aa2984e1b45a7487dfc7ac7e33cc62e2c6082e9de7f24475be0d7b7c8ca1f4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QT3TB2401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ad8bab6d9d87463597c5c4c8350180330a231620463416605be406b5eaf9e3. 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/QT3TB2401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b2f38a71ea93061424e7984f354977277d55a6f817d3fb85302c0872c3b4b3. 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/QT3TB2401397.
Cuatro Vientos (feat. Walker Barnard & Daneon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466991e8525d8ef95071f17387a758c387bb699cf6229b82d761587525a31375. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6F31822570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2846cf4f70c52421ccf7b433ccf1ea54b2b92abe06e13e08ab6a9ebb18f62e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US6QR2400082.