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 0xc3addd5245ca26e89b166ea2328c90187abfb7f26a860593d11411d10ec34f97. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27f5cf82-cbef-46aa-bc77-d9597d4f7a4c.json and https://artists.proofprofile.net/proofs/artist/27f5cf82-cbef-46aa-bc77-d9597d4f7a4c.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 0x1a69607c5ed61782c954e3698fbb8bd7458f40d38cca60df7303d1e2529c3883. 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/USPMZ2418401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564c3215bb88508642b4f54176baedcaaeb7838377ea1bd57148fe895cd30aac. 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/USPMZ2418403.
Inviting Worlds: New Works for Large Ensemble, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54120a253e9e35312c294a659d203edc7c0f58ea4cb37214480818de56d9f423. 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/KRUM71600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b13f6560a3cab78768ee5dc6481bb7461b1b24366d546aa8a45ffa7e696270. 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/KRUM71600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285317f8fee585f33d31bef86bf8bc1383fb8636029c36968b178e938e7f0085. 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/USPMZ2412406.
Prisma: Contemporary Works for Orchestra, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84690ffc99dc2dae10948700f108ddf43785c8ca9eee3b6947ac5eaf667dad4. 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/USPMZ1913203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6011107496e700a4553778c106584ec2e274b4d55b4ebde24173dabda0cbc82d. 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/USPMZ2511304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90250173cd3666aed7e8ba76d865162fc5938d2f83531f7ee05ab1101f80cba. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USPMZ2511305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430549094d98df835dc382d913aaba2d64bf8e3e783d68711f89b4c06f91e834. 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/USPMZ2511306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fc75a01ce649461f556c4cd9f98b4264fcfae674c59facf41a16325eb89664. 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/USPMZ2511307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68ceb4a4dd72cceaffeef3e41071066940552859143be19c6430560b8a3f8fa. 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/USPMZ2511309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a29457654c6a83ea1dcd5de0af753c448972b95132944e9917551adf572d68. 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/USPMZ2511311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2444ee4f70f73552ad4cc2f5a1533ef10525affeba918cd26f2cd81ed6b5c5. 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/USPMZ2511312.
Sergei Prokofiev: Eugene Onegin (Sung in Czech)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab901dca4ab96149ec8c314378c113baf914080231ccc79d432616147a3562a. 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/CZD231315715.
Sentinels of the Dance: I. Sharp and Sudden, with Caustic Angularity
Inviting Worlds: New Works for Large Ensemble, Vol. 1