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 0x6baaac62e87e6fd3fbacece308b4888a0fb2989d16a0e8735e75cd7984dc71d2. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1eaa1175-a2f4-4d37-8f4f-60bfe83ea5bf.json and https://artists.proofprofile.net/proofs/artist/1eaa1175-a2f4-4d37-8f4f-60bfe83ea5bf.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 0xd01add9d7e1ab1769376ea66bfea2c2a0b614a56f1e7e488cd40abeec14d0d55. 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/NLT2H2300793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52a5dfc36616b44526a77ef13d5afad895c26fa9c24fded6a117e3f7c889e76. 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/QZLBC2100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297a87b92cbd280114a5bea91387c3159ea42d89140ad2d8185443c1e0575ae. 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/QZLBC2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101dfc26ec94d767cfac6f03a4bb24177963e7b5e55694ae402b64a4c6f5ee32. 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/NLT2H2201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9458856ef42111974b15b38414dd5c436ab22b2df457564553a938107c89bf. 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/NLT2H2300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf3891ccd99cbb95caf004840ec6c726485b66cf0f4f3214f417ec9f425752b. 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/NLT2H2300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e87b856f160ea2a3e0a408cad7a6f8b888b443702778766a913f57d51cdca9. 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/NLT2H2301206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe2b622cd29702b8c915e2d99b47337bd40319d246da7b04375c4a0422e8438. 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/NLT2H2500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01add9d7e1ab1769376ea66bfea2c2a0b614a56f1e7e488cd40abeec14d0d55. 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/NLT2H2300793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e43a3fd88e028f9cf9659d14c2cbfc2bd117b047657d7347353c6a1c281d52. 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/NLT2H2400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c856d9957347995557ca78a498f4f1663507c18a4d08a5a75847eaf621473b. 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/NLT2H2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad4e70f393cd0bd5d5843499fc5c61c3ecfe9f760f83ad71b41310bdaff503e. 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/NLT2H2300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8016c2e6fb91903d2b14fe273c4e77c226596d835cbd6c377a4285d775a57df. 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/NLT2H2400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef66056eb3bcd655699bdba52179bf2323f3a5ffa084d0e45e09e52befd5b55. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLT2H2300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe3519aa2edcf5e71c0b19f5e1b759c9dbf7fb7b72d3e3674ada7a5b00f54b2. 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/NLT2H2300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b4af2ee5ec2e4680d023bd52123928936e7936dfbaf3f6207ef18840a0b45d. 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/NLT2H2400790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e51c31f3f501cf2c43ba34e5cf8880c7eb9f997aafcb8fbfa583f27ad0c05d. 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/NLT2H2300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5874a22ed27aed0a619fa7c7ea72af27f58ae7b84db46b3da214637cdd79f1e1. 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/NLT2H2500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bcdc2f1263e55c4c02e7e27aae0f733e62018bce1fcaae5cf78f4ba5503999. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USWD12429877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0abf774bab45088b311859ea5064fd8d9364a77b80f4dc22e1d54d919de987. 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/USWD12429878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb479bc37d0ebf4d68844cd7903ec02d42c63cc664ee18a3e3c0a6b4c64717003. 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/USWD12429879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354eec298843298bc15c1bb1f236e4af4b5c02ae2e9cd53c8c5265f25565490f. 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/USWD12429880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90baf7864065e8720e139ff07b6b001c6391c403daebdb8085db7f1c31a20bc. 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/USWD12429881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f42f41f469c2004dfd05f40abf608d7f1cf3d9913b708ec57093d36897fb14b. 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/USWD12429882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e29b0dd110f1b85f0e76b17888a50790d5e001dd0f8ce44b092d7613ce9c115. 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/USWD12429883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4fb982769c81cc4afd31fde9b67b1b1f2ce50a6e32a83d525f9aca57e878ec. 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/USWD12429884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b5b1ae1ac59e38b140f8db4c0faa20bbdf6ad03584456a1dfe41fd5e0c0d2. 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/USWD12429885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc269b1d8f93abb7a66220c7243432016cd7bb0b95696e132db13c3b49266ad. 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/USWD12429886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4edb4b7d7adbf5bd0b72deb15607a244271f4408b717a271f3289fbc4d2edcb. 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/QZTB72254419.