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 0xf9279e8068c510f12150251214969240f08f13832c07cd4ff421dc9b51adb227. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28442b53-4a29-44eb-991f-6ad5d1588e27.json and https://artists.proofprofile.net/proofs/artist/28442b53-4a29-44eb-991f-6ad5d1588e27.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 0x88ac4976fa996ee20dcd2e411a65bbf6f72bd584b072fb0a1b7fbeeb58a73655. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9K2495785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180598178072c3916d2afbee965c98c474c07c693964c8561edb91fc9cb5550. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:08:31Z), 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/QZW9K2495786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841127de3be96c1fdc2909f379e534e98e620a754431a86c432d014fc8ae913. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:57:56Z), 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/QZW9K2495787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2729ec3f79832133ca88d1d60606394065da156ac04bb12cf9fdc28dcf682d03. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:00Z), 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/QZW9K2495788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448670724b1197265eb59a8740e61163d7684ed0de27692a864fc1889cde1016. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:22Z), 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/QZW9K2495789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eed853baed8ab61dc1a128a5c8cca22c28806a9f56794469f5492a64c39ac1d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZW9K2495790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125cee351f3e6d64894992dd9d733d3f02a9b8c13388026ac26b8e0beba10c0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:06Z), 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/QZW9K2495792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc3139b02a068b6ab6e3e7896331301670b8d440b59ca8798f4887317af3ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZW9K2495793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8cd73379f970a51b45f4a13b0dda8c02d9eb08c4637b4abc583721addcf716. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZW9K2495794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa056f291c85b613a3e5a70a1c8aa83faec14fedc151ad397ce2fa968d8aa6773. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9K2495795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ee48fbf57ff37ba781556faad97914e461c656e9c5cf0af65b5741671d787. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZW9K2495366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e6951a46b28e2b013ddba0c7786fc620c1750d4957bddf65df63ba7736bd14. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:22Z), 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/QZW9K2495367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6a1fb6018cbe98b434319e31a337c018c0b9be97af1856aeac47d47bce3ae. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:00Z), 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/QZW9K2495368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5467e120241630663555c21eb14a51deda39e1a1bf203bbb818c05decd53d2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:41Z), 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/QZW9K2495369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587f3069d2e6e6a95f864ca961ff8c4c35ac680c0c903048498162dd94c07c2. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZW9K2495370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d008566f199fcb0b8715e024e10c5ad4838135993e68b7c6c09f4b5f4ef0a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:23Z), 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/QZW9K2495371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77429dc64b4208d9f0d81e2f6e97f334ee0a47c7df55363c202d0b9663723b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9K2495372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a51da802e06e215fb96a4a4594e0dbdc1b530d85b988bd5b7243a3337cfbaa. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:07Z), 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/QZW9K2495373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bfb848554410e4ffe76c02f1e0c83a8a0515176dd2482a7c22d817a68c539a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZW9K2495374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade228e1c4c2441c2010c732f8588941fc4afb3a85b62500aa0788d863ae970c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZW9K2495375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e94217f70b3778b7013db8aef26d658294b7d0517897862e94df69c3aa940d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:12Z), 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/QZW9K2495376.