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 0x52d7525230700be92d92bd31574e5b17d228fc12c83d1f5029eb3dddcc97c9af. 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/aae6fc69-9702-4a12-9eb2-63b3aacf1384.json and https://artists.proofprofile.net/proofs/artist/aae6fc69-9702-4a12-9eb2-63b3aacf1384.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 0x1b95b58c64f20eaf9a92e28192bc911ea20e162ba71ab143a0585492e534b572. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eb4550bccb9fa4459d1f44f6de563f291038e27122b7521f8219747ccb0334. 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/USCGH0926124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55e8931388fff7fdfbcb9ae93a29319f21c189a4c1c0128625054f41f0fbda0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3ab9167111b9ac43f2df8a8a1f03c06da7b43288ad34120df78284d8fb5f5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf50b3cb4d3937f225b0f2e9fc6d58c3fe7a252588cd308851d32e53f22ab29. 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/USCGH0926127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdfdf943b6d14bb46edba1ac9965c650886fa3080a22322b698f7efdeab93f4. 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/USCGH0926128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6d8167ee054d59d4b8e05a5c4aa6e3353cee281d6a8e8fd419c263a0bfd036. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21fde7ff5f02befefee5860da9028e4c9edffd2cc73955b2f40eb9fea8ef39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8eaabdb96a54605f00b8b02c0e100caf3db35535376e1c4cf55c250fd287ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH0926131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7805a0ba34aac5682f199c72a768947f1023aabef3cb0bcc998d77094162684. 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/USCGH2331500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe879f23ddf789e93ebf95e97e44697e50eb087b514bf404c5653d7b0e3728185. 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/USCGH2331501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b2c35ead8724f5297979ca08cbaa620e30d95ba0835a821857b7363cc5ca3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH2331502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbbaf1775746d304eb428ac80bd00ecbbf719d72f4a92798cdaf3290be3c26. 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/USCGH2331503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496f12cbb140011967352495516c99abd0617b081e8a4f017c65f77bffb230dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCGH2331504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50cc6cb1c36eba9cf4397d76aa8d969ec7b5b032d51371ef56ce71be8aa8f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCGH2331505.