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 0xcc4c05c226d72e011c54186de0fe371792d4d4ca4198b272d648c709fa6aabbd. 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/3e1962d0-9f63-4c73-a9f1-6d83a9ecae8f.json and https://artists.proofprofile.net/proofs/artist/3e1962d0-9f63-4c73-a9f1-6d83a9ecae8f.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 0xe4cfb6f927b65c4ee561c834bc2eea4f052621defb81311ea0c708f288942563. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM21610541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cff2d962a157af692e23b03750e4e7f2072d246d0006c8aa90b31c10b12264. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USHM91682082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c618e35ef6f0e7460422d28c3e924817b9bcd5c719393d00610722a9c6ae27. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAEI1935489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe004f43a8c9052bd5c201d43b5b7141b9939e7daf2058925ec83bf6c4122bc13. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:58Z), 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/USL4R2042639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617a3e386d616ef9c48df4fbaa70f133e601865779a0e0ebfa5eb3955df1094f. 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/USL4R2042640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d29d4856dd52ca83d026c8adfc2f472be6e3d446fb263354c37b93d23cc4122. 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/USL4R2042641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478bba5bcbaa597d7a68560f47576c0a0b815f6239a775f86119191391fdc338. 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/USL4R2042644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826a8c5f1a4dd52a1b1ae23c38b1d6f01d968476a449542cdfeda2e5a5b4844d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USL4R2042645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af7e0f5845d9f4f1bb138978f3250afed23dd0a21771309c37781b981346b98. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:56Z), 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/USL4R2042649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8803278a39ca9e2eb0c17650caa53291fe66f33a5c304f2fb8afe58795244318. 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/USL4R2042650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8a70c50a7ddd734f5b404464cf26e48e76669aec15f8627a94abaaeb9decf2. 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/USL4R2042651.
Esqueletos en el Armario (Version Acustica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec122eda5d039b74fb9f387564bf907027b9d762403dc8e335238186e00222c1. 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/USL4R2042653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b80968237bbdc24764baf52815060eb633c49a8946cc56ad9ee5b6c7a65190. 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/MX3741700376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7806113d5a43e7a02cc8372d9daae8844ddccad01f88fb9dcf5df68a861d1eb2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MX3741700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684cc9b47ffa1bac05b09806a145b3ae72080701ec5ef8e6d8765973a56842fc. 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/MX3741700379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc2431dd29e584d64529647fc12baf401e48f23c7f6418c14067495eca24b0d. 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/MX3741700382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e1648db132cfb4dc936ff89b59200a01c3c0d91a0aa4316e0bb560082c1aee. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/MX3741700384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8f74ad0f326178d21c2d2c3a55a43ab123ca2bc83463e4d64da935e51a8e9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/MX3741700385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7370203ed13a8116294cab29ad1c06deaf7bbf3d71730c0b315a06e48cedce. 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/USCGJ2154921.