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 0x7bb1e06a084b1041249c00cb1616b1b35aac12e6c641680d4d7147c01dbb03f4. 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/9a991d10-c941-48e1-9a01-2b7b6d33dc21.json and https://artists.proofprofile.net/proofs/artist/9a991d10-c941-48e1-9a01-2b7b6d33dc21.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 0x3524214496745444579e3d414250303197e8960300a036e7677dbfd43c560890. 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/USHM90582905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf44d2440d437a047decd01a83ada3ab718c8a6b4cb0e30ac061c7b52724535. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:11:01Z), 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/USHM90582911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79883c7d60a2fe5f9251067ed9af7dad80cd17a1056266c5cdff6fa0d01a9518. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USHM90582913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff2f76c3ae8b407ff6e24889d8c651654ec0ab80d32891cdaf93d86503973d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USHM80737186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb974b97fc33f06d8427b3851a785e602c07dfc7584fbbd4ad05b54589d9213. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM80737187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb30083f63cfa34154434ee24201ff3429a7358f9aaf04757e5edbe3798cf86. 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/USHM80737188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf17c97a36a334cbae81adee35fc3afa0e18368a6664c4fb1978b7ae45bd09. 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/USHM80737189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82310bc2265180a9c9aec0df9f055d6a3ae87347433f2adefe82b400e3f7262. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:40:41Z), 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/USHM80737191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19022de2e70e563c6f481927b9343b75ddddd1b1d44a60a9a11369e5c120b3f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USHM80737192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa201d55892e8742d60a8e353616157d4173d29a61335e49635229dcbc9c78a29. 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/USCGJ2259559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d211317964fc3c62cd966dfa13e0461515054b9de7e0a701749cae12469f4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USCGJ2259560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68aa7005824d0571c971d597edf2c56ade4c99234d0026149a9bf600581d397. 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/USCGJ2259561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7ec188f9b0b43657fd1a28684ab5eb84ecd8b6623641a1facce9c1abc18758. 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/USCGJ2263982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3083806ccbaaa4e01d5f3b82364b076be17e853a358656ca216e4a128e823fd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:19Z), 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/USCGJ2263983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c946f6f164d450597723715a9c79c48fa656250e79aabbcbf2632bb453c382e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:57Z), 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/USCGJ2263984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf053ef5f4b9741151caadb90b5676b2923f8d6c1ff3ed0db7e316d812393ae. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USCGJ2263985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ebd0b21ed458414d9a3754e16721e04bbc0462b10ac5b1ff378cfae68057d2. 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/USCGJ2263986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1217b80f5291d77c6afe40ee98d1f270f8eddacf3fd6bad7241c202a26da73d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USCGJ2263987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10268501f1a8df2d6823a6500c864b0357549af51fbfcf7909017c2912d3bdfd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USCGJ2263988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c8e6ed30bbde21083ef5d0e526c2b077bf6b9228fe17b781542f0d13057aea. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ2263989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387177eec21a3baea4b4857a48254530294760102642db1080752b6a2c828cd2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USCGJ2263990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea1cae99382684c21f9ff5b1c973e64725f6d617e9e49338fd73391ec2f0ca. 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/USCGJ2263991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65874c25b7e4dc8ca7c1e1a1a82303890f6a713e6d57440117d2c5f57a2cf710. 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/USCGJ2263992.