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 0xa7ef01611802f0488ee8df6219436d7bc926d3cd50a1eab27011b37bc33c123b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd389b01-43b1-4f84-8974-d40b0cf22dad.json and https://artists.proofprofile.net/proofs/artist/cd389b01-43b1-4f84-8974-d40b0cf22dad.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 0xb1d8819a54ce3e50791881211a74779d0ec7677832bd16233e6f2a1519823d96. 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/UKXN22238601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09da6bc23ffd3ae36e252bbad324e05802ec824c8a28f094e51de2449c0b264. 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/ES09C2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd0f0cecabf79fb97019c9b05cb12f67e460076809197218b582a199c3db7dd. 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/GBLFP2212437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08fb3d70028ec4116f3679166377f0340236aa77cd8d3870f993e92aa42d69. 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/TCAJH2522648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53c1dbb1bd775e5adc739cae3820eb797c993dbb5aa6e1a3df8ac55b3398feb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAJI2513339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c0b2829045af958f8c939a9c4c9265c1c1f760c23135f397cf0043cf18a58. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:25:27Z), 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/TCAJH2522897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807bf54fb9fd6cf5d93185270cddf150902ca491c63756127ca2f91f80af08dc. 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/TCAJH2513499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe43e4a259266afd0615f3b33007425c5cace4b96f1bcccbb08a989198f8efe6. 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/TCAJH2522834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d2e6e0ddc78e3c6ae9f4dd2c08faa0619fcc991b34cf01f6c230d64595a16c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH6542288301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb32a6d20e67113b1dd4ea2847d6212481a0d766490b4bb22e22b4ff9fcf0942. 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/USHM22290392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b14ec8c08afb84b6759aecfdfff7fa0365a96808e7e4784c9bfdf20f4c7bcdd. 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/CH6542089053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea1811e71595cb6cdaaa0a6007eca97db6d8558a35c9cda1d78654b46ad8f9. 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/USDY42045713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64ffbb187a59cc90da33398db704380129df0c6221bfbe6891db2904a5ea93b. 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/USL4Q1997864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a17a2eb13ae3e4d83ba74b789bdd0b184f0b39cb7a0b331602f120604bbc2e8. 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/USDY41900617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6f8579123cca7e6f2b2e07547f09032e4bb771e9c14ad370b4aba8d4ea48c0. 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/USDY42103937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09da6bc23ffd3ae36e252bbad324e05802ec824c8a28f094e51de2449c0b264. 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/ES09C2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9837076e1ace6e8298728fbe0919e2396df3975c6657a9fb99a89df6400e833. 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/CH4196581459.