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 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 0x0588c3ddd4977ebfaeba829fc6b0f74fa0711bc9668748be95cf5f5ebd100784. 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/7fe2c78e-00d2-4611-8afd-08bb0a381f71.json and https://artists.proofprofile.net/proofs/artist/7fe2c78e-00d2-4611-8afd-08bb0a381f71.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 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 0x4e40b58368d84da2e53a2438d40b073ca8ce3a50927457ac89848ef6adae70df. 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/QZK6N2020223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d00c89c34239e9714845de314d2d5290821c1c2c818318df580b3768a288e3. 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/QZK6J2053886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726a3a66bcfd484650f87ec1bba9eb943061994d11ad1f2df749fbd845455bce. 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/QZFZ52108529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a8748579f0a6dd1fa0b948cdde1258d06334e0c29dcba1a6cdaea988b9261. 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/QZFZ52108531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c134b7f905786606f866bb2ae5a85958a60b1a4b051f2f45b4b5d4deaf12076. 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/QZK6J2125726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4b2f9c46fc657a1325a1f406a606d2253ea19897c1da2fac077770fde51529. 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/QZNWW2131163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71af64b0ca2a8de9747c2c521ead40878dd1a3589fb32db93adade230c691e86. 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/QZDA62267834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e1f72d4360a4428ef958d0629c4cb0fac912439f7be28da3f837612b7a34dd. 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/QZMEN2218057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b85c768b8a0ee792e7a987db0d835f718b52109245d7db576fb2ff2a992617. 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/QZES92392948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0b6b6b967a14d94fd067fca9c5ba4499eb7de31cdef0b2dfd64d27ed436f53. 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/QZPLS2346630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd764434da17b4495820b1c3ba6541a69fb012d1e54c51f3641c5734948e58731. 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/QZTAY2362347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190a16d99e502e694d900a8a5fb9eef4cc34307fdc7e6a2b3928cf9cf4927122. 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/QZWFK2336273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7b7163e85f67b90192f4ebb56e0811c352b6a9ad7ef5ee87f2c3630af46960. 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/QZWFK2336274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0588363cb233bdaad2cc4225b4cdd9a5c7f751a79a9db2bec06ad3bc90c88419. 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/QZWFK2336275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3302bddf73d30c30d355a6673b5d241c64de963ad4f79e314b65a443ec0d0597. 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/QZWFK2336276.
Everyday Feels Like Sunday (Live In Toronto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0653b96e0a31a126dc1f6a4b79f9f3e5e4cdbe8dd7fb64c39fa7a052be829dab. 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/QZWFK2336277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5998b0c114a51556eff5a6d46d2af34db6abb70a65aac03755273b60d7f34d. 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/QZWFK2336278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3917d9edafaef5e14e78a5615f7ce8ff616a96c891593ab5888e3c58cd7f9f99. 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/QZWFK2336279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca83ddb786004db2b161cd8a5a99d38adcb405f695dabb934ef027cbda460d9. 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/QZWFK2336280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6caa8f7ea80fdcf832b9ed5f698aa45bb53b314837a3ea0aad84c04fda97eb. 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/QZWFK2336281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d40d6d5660959b1e96b27d1d842ece51c26a17f1dc32310e26a08ba5b57728. 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/QZWFK2336282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed7dd42290d6b533b14346df55c12250dfcad4c278b48ac2b744e303938e971. 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/QZWFK2336283.
Maybe We Could Be a Thing (Live In Toronto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36053e825a7c420cba6bdae5485fda6b42879508a768c10ade7eacf5d194177. 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/QZWFK2336284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1065b8ec65f57859239557c641ac13f68f1209625aa455c4d2f6e1831c8e4f48. 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/QZWFK2336285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707543871c32b624b39ca7d32ad9c33c58b984888c009d372a2ec338be4ef3ba. 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/QZWFK2336286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69366bcaeb510b20d8c429ee98d89f43e6ea534e45bfd9d4ef600c2dcc694e. 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/QZTAX2408435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6dadbda83a902e35b98b64c56ab90b678685a6e9a75f9435099b287b6befcf. 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/QZWFN2441532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30579110d27274884b37e6cb2da9081eaa4e4094b7144f71d379ccf22e1b4019. 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/QZNWT2584832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9681d2b134736a108e62e08a369e9b798855dea2344c16b3d2c6c1b1c7d4ba. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42572474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26587e79ad22f35fd197ae3952db2f72532e877a24c19c77a2e6d7f7f4bcafd. 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/TCACB1409193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3ed941a045cda145d60a0c2ad37c213bcf3ac4a84f6b9716a89e4cd82d4cca. 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/QZHN52270325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2162173512cc55457bd45b60732f06c1f097231c53803a442e023807fd3516. 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/QZES52084616.