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 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 0xa05a335cecf06c5260f746d62f84e26220ab3ab70348ce59ba243c6e789213f3. 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/c746c1a1-cf2e-4cb9-89db-ed493b37ae7b.json and https://artists.proofprofile.net/proofs/artist/c746c1a1-cf2e-4cb9-89db-ed493b37ae7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Recomposed By Max Richter: Vivaldi, The Four Seasons: Spring 1 - 2012
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 0x18ed3273da0ce5a08844a473ce4cba3535ca99b2ce00b5fba70c475e1fa36b3c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM71201995.
Recomposed By Max Richter: Vivaldi, The Four Seasons: Spring 0 - 2012
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf093a31307ed62a63dbed150a56c9da4c1b2ade45849278b3a2d735aea9b7d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM71201994.
So You Think You Don't Like Classical Music? Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ed3273da0ce5a08844a473ce4cba3535ca99b2ce00b5fba70c475e1fa36b3c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEUM71201995.
She Came to Me (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4605356cd6eb8787d2daeb2e022f05818d563b958688b7d2b7df1485b83859c. 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/GBAYC2301231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22265e40e66a84fe6ab310ca62d170ded76e15847b8af1efb45435fac45821b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAYC2301228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4c1ef8c038d57ea297eb751ccc2428bd442df78611a3b4738acf3e2873d9e9. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBAYC2301229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbae90d57789fd9d61a9ba7adbb09012c7c958236d83c40e26c9de54c500cf70. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAYC2301227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f4cbdb3a0d9d05e671077b35ee8279a568d16eefefc626145fddafaa1d6e1c. 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/GBAYC2301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea019e7777a435a61fcb3d42ffde4b8ccf0707ab7deae5473226c4f9cfbfb32b. 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/GBAYC2301235.
Dessner: Rising Strings (we just have to keep reminding each other)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab7071cb777f05f9a55fecbe73929e8c0243b66c1f9a34357d7d182d355a769. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC2301242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3f47c5e25e9c2cffb495fa15e64d516ef2d39b84a8d24ec5d34b44344f9323. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC2301234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900b35466e44064e241856fd21fd51ad6d62aa1bc6e34ba52a1ee15d0cffe5f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBAYC2301237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab92bd3baf0a80dbc766249939e67dd87e3c4076c1b0de7524f92894bf8d8bd0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBAYC2301241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda24e9224eee35ee21f918eab7245a7832e77edd5f19c3506d181ba767c15934. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC2301243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6251792210978fa99fa915b8e40f6dc25eeff7d022a43c89be52ed6f65ef37. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAYC2301244.