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 0x92113d9cab613d7dd09ef4ec36c72d71b3484b444f0886a3b856175e411d0ff1. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c091c2a3-31e7-4d1a-92db-5a727f63e49c.json and https://artists.proofprofile.net/proofs/artist/c091c2a3-31e7-4d1a-92db-5a727f63e49c.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 0x0101d0882bd95fbdac1490760543f73c0df5bf7a1e37f58dd4c8abcc987baa61. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USZAT1672418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c665a3214a6ab179e812a733a88c8d4f442cb241a2072f314a223678ad2a19. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USVG29552085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129a515854645537212e0ce450531059cea9fea19d6f6eec88a05b65742702c5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVG29552088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d21fcb3cd3a67a9c0be30d9930357ebfb4f7d3da6f7f1255b7e42d4c2e423. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:43Z), 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/USVG29552191.
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 0x579572d4edb6184f2c79b7c65496c120a753c4b4d2752afc0ad8802a479c6e15. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USVG29552082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acf669964fd2342693af21c24bd2bb5a9934670412328947ce64c37d829471f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USVG29552192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc359855fea97810e3bc5db0ccf12b918ad6499fc794676336984b129285ab582. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USVG29552084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616254568ac9b57309522b549fe6c91e492fc825132bef2867c4e4600e8efddc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USVG29552090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b2f1d822d9119a55d5ca370b3036da08fa7eb78726729b4b628a6527c5b4ec. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USVG29552091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a1503f24c71f7082ad7169e526bf24caa2f0c70a684db1392d0b04f2d5482. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USVG29351295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c66c0e541a4117c51000d1c32e249cb39cdacedc18e5d8d7a373d0cfc9bdc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USVG29351297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3dd7cb050c1a54b0fb58c3dfb0076428b22a13f530c00a455ea02dc4cc5d5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:02Z), 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/USVG29351296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e88d93eeac2e851cef32d0af88de24758cfede4afef078fea362901928b3e77. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USVG29351293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de9129d52b232bed8b52b415d658c045cddf42b0b398b68d48d4648bbde360a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USVG29351294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620837ef64e092c60844076ef30b3576e48f42f4e407f303803237480209936. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USVG29351298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42706f9571d6da87928622877dd2e73d83bfb6e6d48734dd87a74b1d63a09c3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USVG29351299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1615803aa8226725c9bda6d8cb03ac8bde8d6fa29af611f4566b587ab71005. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USVG29351304.
Christine Lavin Presents: On A Winter's Night (Deluxe Expanded Edition)