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 0xec41f57eb1d23d5799e4680975f15e06ea2437a5e1d11499953a93a7297bba6b. 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/d29e48cb-6d6e-4e6b-afbe-7188291c7c52.json and https://artists.proofprofile.net/proofs/artist/d29e48cb-6d6e-4e6b-afbe-7188291c7c52.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 0x720fcca064addefce989b03b70f16c47cde54783958ac76bd390092a91762d09. 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/QM6N22048706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e80699367ef43e038661737193a6a71bd80d1cba322e4638a6690abd789ff2f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:58Z), 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/USA371386634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514a048766c54d4b210f679f5b9bde256aa3d49853844269d92b1e987029f4dc. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USA371386635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2201c9054aa486876f7999d15446b25b26d2151ce243367db3e48fe1722f747. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA371386636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffc0b4ef5589d64fb4afd082ef648a83b7f13440a5cbbb5c0eb24e2cc56e083. 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/USA371386638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a26bcd57b608a99311aa8edb8304063dc7ab6aa480856a711d744e554c9e30. 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/USA371386639.
Rivertidisimo 2 - La Alegría Continua . . .
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6148c2808b9b80c3ae277c7cf79442146ac152a4488cd66a65db46765f0f2424. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USA371445049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d6eea8ba4950ce4df649d44c99b132e06e713f3c86d2046ea78b56efa7e363. 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/ARF049700520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81598f95c969142c25941ecf83b7daf2c5cfb72200766be22020cb38f6125f20. 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/ARF049700516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30c42ff2daf8d760bc87def98e884fa9b14b850d6b5dda896c111af6af4f264. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:02Z), 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/ARF040300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6fac5541df7f919c272e66d3eb82769e9019974417911a73b21d69064032bf. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:37:04Z), 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/USA371434807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa91f582ee2a7dffebc77237f87a6692d0230795184379df6ab6f505254f53. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA371392818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f82c54f92d9d9c794eeb797849c714b5caf06fbb6e96c3b69825c024209f9c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USV351480908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32778e4d3b254fd298dacafd44b35e38b5aa22f50c24eed4f0eb313af96f9df. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:47:22Z), 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/USV351480905.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260610009a5f83da9fad4bfdf37d207aed76ba6cc4994b999eda89ba8d53454b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USV351480900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b761db6f4f7511665e16e8fce7ed73f73940c71772265c2735145113f6c4f6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USV351480901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e99d1d7b4b0012ad90b4e4aa7d004445d92bb0e91c2f3271f55957c5e57e9c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USV351480904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2abe4bb56eae8f2f72da1e0193cc892d993618bb4eb916ccea453cc0a1efbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USV351480909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a479fe8c1b8e783975ab793758b17d2b4edd9ca0f90c2506524235a4bdbcca8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USV351480911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7168baa6fdea046e7bd92ea715e0f1fadb566c6ab688419eaf7a47149342d010. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:33:20Z), 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/QM6MZ1821617.