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 0x8a53559f7081b2a609dc46325d35aecc0525ba658979c4035b1608e82d35ca75. 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/a75d96db-7af1-4e7c-9ffa-b559afa14c2b.json and https://artists.proofprofile.net/proofs/artist/a75d96db-7af1-4e7c-9ffa-b559afa14c2b.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 0x961c81cd7e2824c718e7da1020d24aa01a96f60e99a911ecab1d291a42a2564a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DK4YA2317001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33bcd4b3d68b9087067f6c1bad311e30bbb71fa7836d5cbe4978e7f2af55273. 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/FRX762272297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642bc72471af3805901f23ef8c5729de80f26ea8651b5db946edafd765720764. 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/FRX282297399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef60318e3475c8d27bb0d54d8e974b0e2a995cdc2047a55dc3c69fd4c59a2d2. 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/FRX762232389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588c44effb117413e86109696f0ab29f27428374df4aed8e98bfe3c085330e06. 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/FRX762272298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed9ea8edb0ab2825005ec98ccfbe6976d0d3911066649e7483b8dfbe235821. 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/SE6I32469946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588c44effb117413e86109696f0ab29f27428374df4aed8e98bfe3c085330e06. 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/FRX762272298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0abcf5659103f5f85915034ca28bec6ff00150473c5b63b39a7e89735c227ec. 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/SE6HN2457573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8132f680f003781a0d03f353132d246d73d865286772ffe2ff2bcc5e4b716a37. 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/SE6HN2457574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673605687ff25b01e24a3246021ce31e977cf6786e0bdd89eeae276734a87097. 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/QZHNA2357341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8ea204770960321611704a9f6fbe028c17e40caaa20babed9016558313adc. 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/GBLLT2311773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8c281cbc7e6d7d99c0608a4554b18addf7a7e7528ef474d47ae70d6e46ed2c. 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/GBLLT2242480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9adb32a69748ec52287ee8d6ee470679beeaaa1ab78d60645199c92c462b0b. 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/TCAFP2142850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a2a0f5324093d661b4546db7e417a1ec7d17ec61b737766d98a32089d4d968. 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/TCAFP2142782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119548733f3d399c398c148c436f30bc93e5d7769ff3fd5a821365ceda8d0a81. 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/TCAFP2142813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592778ae84acc4e468173c1da6f94b3eb2ca5a7a3fafec2f70e029945bcdb6cc. 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/TCAFP2142759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f15c959ca1c470dcd8174f926a4a4d90cd673033ce40bbaf35d1e7c5a84288. 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/TCAEH1971527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7beb167eaf1557256f94a5d6dae569c8c3f4896bb1a4b5ec56006d7623a6f1c. 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/TCAEA1849876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf995aa52a9881bf026c099142a9123c6973c247d662fecfe03a30f4417b2d45e. 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/GB6ZW2000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c822a694ab94b7ed15c401cb02deecc2cb5089fa58c470dcd84257e4483972. 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/GB6ZW2000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf665594753958a004f27f2a2c6700d2b2fad58296d0008a42118d6530b074c6f. 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/GB6ZW2000177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f7502fdf979b1f35cb63b483118d184cd3b7b1537f1effca95dd30448b4c0f. 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/GB6ZW2000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3f89a77e290d8070f992d77823c0c328887535ad1615837d490ffa3ac65872. 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/UKXN21996146.