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 0x2ac9348a39025b1590a5b34d64018121ac9554d46ac1c450214cf36893c2931e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb03cdc0-237f-4774-8bc0-d064bd9e6af7.json and https://artists.proofprofile.net/proofs/artist/eb03cdc0-237f-4774-8bc0-d064bd9e6af7.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 0xe7a6dda6abbbbddc477ac354d412b694fe540f4f364eb9a37bec55a2ed08384a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:57:48Z), 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/NLCK41001663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d801fe2d76accd3d58e997d62d32aa1b65735343709a7073d1836d9941c8b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BEB681400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f1356e10b4e8be0944f7dc4d9258f0adb9b35180869123a9515353c425ba26. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:22:50Z), 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/BEB682300090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d83f52abb3ae58477c461a7fdd435b837a8ea659d1c6abd36b23087d2c86e5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BEB682400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0976724ca1f89411283b459fb8cb785c37344f5ee294d52b9a2ed44b471e79. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BEB682500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa158c633d231d3161d1316f279640e639dc69b8424b9026760f79ccb88217185. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:56Z), 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/BEB682500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb02a0e0b341678f509ac9a19c1454fe8f02fd68b26181b1c26034302b0fa990. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BEB681700454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5409747ab6fc6cd3d890461b0b5f2e6406f29099dc72e0f8779d849d2ae0b7. 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/BEB681400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7d67e4abf6f63d6ce0b7dfb9f9338a3266846f7f0f8d2d95ad20d0281774b8. 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/BEB681200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28743b08ea553ed89e5d0fec6f18b49e7c007c72b94b9f3e68ae36b28b058e6. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BEB681700445.
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 0x0a0a909ac3db9b439ac3db7b8a8bda1bb23924cfca6704b9b3f9bf66acc46fb1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BEE322406018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b7026a0d260f318aef6543f3d5e579d1d861e6d6c2790aeea2ccb6e8e31001. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BEB681600316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecefebb06bd5324bac61eb8f84a1e7d33df3658059c5f58cd7b33261a8cd5388. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BEB681200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3651413ede5590065756035cf32c73b3c49e6baec5cecc182841c97d9f4bda. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH9742300143.