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 0x54133451a9948d606f8e735c4fa741b7280334fdc6764620da249f4064535d0b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf685d5-0d27-442b-ae80-f0685f15cbe2.json and https://artists.proofprofile.net/proofs/artist/3cf685d5-0d27-442b-ae80-f0685f15cbe2.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 0x01afd06995dfe45a0b186ca1022d3d198954cc20c4ffcd25105f9b073f74f3b9. 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/UKZVC2000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8094b9bbed9e3325a757f243f402afe35335255fdd8061ac68857e49ac05463. 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/UK6821728891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de114b201c5b17234e78b3e5451682572034e90de42281c7dd130a771ab9c9a. 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/UK6821752398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0f917d2b86b29254c5c12db0b9ed5754db71d734d0a3d95aa15bd9311057ec. 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/UK6821728858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbdc63cd4d3bb43e17cc883c9d3802f1c8ec76c1b44108162fac93eb0921cb9. 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/UK6821728911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690870c8e9d47c8c645420c0accec7dbc359e19250cc618fc0f1e222a0e959e2. 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/UK6821728919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3210dc41666727b6c4b6cb7c8aae339b9fd27700138a9cff099dd5f2754e2c8. 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/UK6821752374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8316fc1c4ea61934197fae2cc15e07b3e1fd86e052ad2be21468e7944b2266. 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/UKZVC2000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb643fbe0c1ca7a62fa9b6433d68f61af816efe6c3f8e209bd987b4bf319bd8b9. 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/UK6821728914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f9ba4e6e0118fd8917d2673917232426b879b4e21e35c6824328ad46d1741. 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/UK6821728925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8664009a4bb5df8a33b30206706bf507643bf7001d103331708eac68fb51fad2. 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/UK6821728934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e27534999735fc7d25d1e4321a2f46d4aeead2d1c74ba2d6e07fb0f121c69. 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/UK6821747998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00eef3c6217f88164605f14f30291c3719d0dfe6e9bc0dba0ac45efe8784111c. 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/UKZVC2101273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ce4ba1482d8467cda1b0fe860a11aa22855acc62dbaf6e0cea106fdf0e5b97. 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/UKZVC2101228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbbda8ae52ddb5445f08944891b5891ece6a3812c07d7a17dbd824af3fd34d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKZVC2101261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce642ea5c2c7154d3839d8e0d35a96f54ab29efd9eb46ac8397fb1ca5f679fa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKZVC2101268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c51b85ed59f02fd85d37e886561833aef912624afcdbd0f456bd6c61cd295c. 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/UK6821752379.