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 0xb1789a24efc79cacac4625203c66a3d8e4908acad2f2b76b97d8d33b535b2e56. 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/dab8e0dd-5054-486e-8b9a-cd0d278dda8d.json and https://artists.proofprofile.net/proofs/artist/dab8e0dd-5054-486e-8b9a-cd0d278dda8d.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 0xa6c88eaab23f01a84ff965ca97e03255ee983868b6146039f4c3082a880d56a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USF068827060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414550558c0abb19b82de5246e0d49bc1d451dc891d50e19eb3f734e0596c6ac. 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/FRZ029102150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c09e78dd4c52f1a3c9b23e4f71f1d5a0af4bca60973eca3a1f4b439ccf16754. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRZ029302180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2e9bd1a27054f4fda65b6f063772540352aefb1253793491aa39b4e71487f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:02:08Z), 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/FRZ029302200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc648c20c5596a9b60a3bcaeebad01d0bd6ec50ae0bbc4a89bb02e4da0caaafff. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:18Z), 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/FRZ029302220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f57c24f72e5f3cdc7d0e6a4535110e47c6ba765ba78b18a8482c7785301cab6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRZ029502530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa868652f66aec952397c54995a7b55cdbab6534d9b26a4977a0bc49783df1df1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRZ029900570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc425c3498cc6f59519e60b26e5aacdfe43920ddd99e5acb23edc28265983f3. 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/FRZ029900690.
Charlie Haden - The Best Of Quartet West
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76901a02de3e8dbb293b2bcd383ee7c1a568eb9b44679cb21e59a348596eb84f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:46:59Z), 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/GBUM71027084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52ca2339b7d3ed99fc3c8eac3b4155b51e750720d53a01acf66636a2b409e2b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBUM71027087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9f1d0e6316dd8bb513e15571faddb510554acdc3e9bcc3e62d217e506c0032. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GBUM71027083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67a587e92d1578181f6354c830fea4544427772ceb4fa2eb25c0ae7a76b76d2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:08Z), 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/GBUM71027081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24789b4800f0eb4d10a3d11126765eb4b4d73f43e3c6b4b4199da0de964c7338. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM71027085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24789b4800f0eb4d10a3d11126765eb4b4d73f43e3c6b4b4199da0de964c7338. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM71027085.