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 0x15da53a2f169e34c9ba9197fb9738c19bd07fa4c66ebaac4d6839251927e1909. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cabca1d-46ed-496d-9d6f-b148a4f0a11e.json and https://artists.proofprofile.net/proofs/artist/4cabca1d-46ed-496d-9d6f-b148a4f0a11e.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 0x621550da9f288b3ec18cb4e226f65ac39d1a1322d63298a0c5264037b32e0dab. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DKPW61000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81178066d863f31542d922f1efe3bf8cd5cc2306e0b3402233d0b47a53c51242. 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/DKPW61000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3b73ea9c6374e88d3b1fb96694065519dc3556cff45e578e82a3a9c076999f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:53Z), 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/DKPW61000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba5d99e0676c2445582342e1ffca6236c45df6045b5ab7df19668ad33d0c668. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKPW61000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580ed16472effb2aaf8a7e0a08a15cb5cc13282b1f784986df36fece1cc54835. 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/DKPW61300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb466e588ed0910e7735fb7694630ea11a58d4a33210c1e606fe29e2a61549e68. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/DKPW61300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda8b6b176ffb1d64e1608cac875fa3a0c05f637c39358f71eb0b6c0d9727751. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DKPW61300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa674da1026e0504f6e7da93183a9ae6d53aeab8970607da6a20a98d1d8ccf93. 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/DKPW61300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f7de0d95be2de1d6e79f6ef46b5d07b703c1f9d39484476118017cf68fda8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DKPW61300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c80b582f676744121911bf8c58557d33acd516ed13942afab39aee230441ff. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DKPW61300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3607da6f6c9ec3b593992565a49cf9c29e85f96cf832f79097b95dcfd1b2d2. 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/DKPW61400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd2e0ccba1f65189f661121202a663f45cee8a614ff5fb88c1617abbc3d189c. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/DKPW61900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a343562e07db0f5853ee489aa3134c4f7fca3af9fee047afb01c23488ab22ae. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DKD5J2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48129c74474a17d863c7c8abcbe7b48ac4a8db8b57c99f08527eae5a1880ece. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DKD5J2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c0440f5970df1c2af54d20c7d5640834b4369c98c3a559071f6b6941ec8444. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:53Z), 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/DKD5J2400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f175cec9cbadb14f1ce1f6cc1d14fb8abd90285abe6dc3102f1f75f9988b10. 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/DKD5J2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925f0b6cac2cbdde1cd35d02bf3a1858423bd5a488f68fb7c4a1d327eb4a49d2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKD5J2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4b99f5d32c41e67abc398502dc6b6c77d629a767c8b0c9dfe3dc6572beed0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DKD5J2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffef01c77d7f56ab3810f3155db9d6c02bfcf9e5b3aaaab87b1dfd87692121e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DKD5J2500202.