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 0x311d97e7b4aa365d3bbbad7de2a8938d52467a802c251a6ed348a6750c7ff0c5. 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/5a1a113b-a001-4b07-9706-0005b4f339dd.json and https://artists.proofprofile.net/proofs/artist/5a1a113b-a001-4b07-9706-0005b4f339dd.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 0x30a49a0f36baa563d31dbf69d65694fe9ed8ec94d83e94bcc6dfb09ab646e2cc. 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/QZYFZ2485740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a02d4ba30fef69b1bbe32a717c718d6b81f505ec25ec8f6b343e4e402cf637b. 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/QZYFZ2438791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7af45eec1e0e0bbf83bebdb87df1bfe1364dd08f24ce52609ff14e5dd70cbb. 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/BR5TG2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a847839bac24cce2eddb2ed0799d9525887a2ed46450ddc3485942d3747ce4. 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/BXXYI2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc772d8d482b2c9cedd3c22e3da76437dea9d88961c11f29b6dce00a457ca59ff. 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/BXXYI2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77696e5d0684310f808685a3c294e6aaa1a633527836c4e7307a99791f47389. 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/BXXYI2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094080b932323043d82daf1d28cc69ad1fc741da4bb738ea1c44d2e4f3240add. 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/BXXYI2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8ff475f39d0024363ce5f927d82eaa69e241edb9150195268c2dbd01bf7e37. 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/GBRKQ2245788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6b7e76277806d43cf746ec06d9e08094ba4f91b85091f565e2dee5e57da76. 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/BXXYI2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46e68bbd64acb911bebb650955bb000207a0ff73192e5c1d11e9d3f720a3192. 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/BXXYI2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5990849ca65ab6e279b43860f3b55447e9b9995b2dc559276956696d430cef33. 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/BXXYI2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fb1c16ea1998121469d43678e2bbe513ebbc6030597983a767bcaf4504cf6c. 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/BXXYI2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ec83bbbaea5fbd94bc3d7c8527fee5da980e0507a561fd14cec262b98df844. 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/BXXYI2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35ea105258385c3eb592f2251cba9daf79aa98953136f3713c83b1b17fa3356. 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/QZWDW2490020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadc57eebd1c743b0cb9b2d46cb74471b6b4ebc4bd8978ff78fef39207a8db20. 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/BKE0G2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa853f10b7be71a0c2f99b78686a96acbbaad89c707aa394fd196af44ef8e121a. 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/BXXYI2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b6b7e76277806d43cf746ec06d9e08094ba4f91b85091f565e2dee5e57da76. 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/BXXYI2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77696e5d0684310f808685a3c294e6aaa1a633527836c4e7307a99791f47389. 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/BXXYI2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094080b932323043d82daf1d28cc69ad1fc741da4bb738ea1c44d2e4f3240add. 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/BXXYI2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44776576e649b816fd40d15c406aa2efc0452839908042034d2cc3015944484d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKG5D2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648d77db6583d96c775c9776bccea87413c3b2fd15ba2458c2efb58772423707. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKG1Q2400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf747a90eeb69db30832bf188c1814e9f6bcf9116db9e81de6ff18769af3bd50d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BKG1Q2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0abfe0ce858736e427756fd6a9120aecdda269888f04e65fa4f1b97db001f. 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/BX26I2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e1d146026956df92050c59eaf9ca7b602f2fe249e9d46d629a0ab7d879d9c3. 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/BX26I2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68bccb7d0ce3c259d80d16734948d621af0bb45873c95d3c23c43c10e7dfc05. 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/BKG1Q2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78802d9f0164f205326298d139f8d4c28e522063c73842ec8839bd1e877e3877. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKG1Q2400209.