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 0x3d36550dd9e1bb13979a16d8d8be88fda058566c1027fdd0dbcba8ba345634f4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b392e51a-5f89-4b41-82ee-66015f1e37b1.json and https://artists.proofprofile.net/proofs/artist/b392e51a-5f89-4b41-82ee-66015f1e37b1.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 0x4f8911fe05adbf69824cd093e0c9abc64137dada184bdfbeea34a3c786c1dfbe. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USYBL2301197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f48e447736d56308dd5c9d69c9320863fa43f308f6461294374bfc2711905f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USYBL2301198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980d0e5bad66de62946210eb8872a102a4ab76d5551016d10fcbddb9ca7b4d81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USYBL2301199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5940a0bcf786804016e0eaa169ec3588a220ac9678cf739f04e9e7097eab1ea. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USYBL2301200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da79f871705e6ec4f6f02ef35f8e34e5e0ecd5dbf400a53805a94adca56e565. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEH742325289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3b88003acd59f0981e802d221adebc9db4ed3c9fd10060be42bb21386bb9e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USYBL2400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e1ccbb6df10e0bee4c0025bd45f1ce9ad29abb516d8c68e5b61ca20436590. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USYBL2400729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2bfeffa379fc44a5de7b7c34b3b558c2ad3621be647bd52cafbfb00308a9c3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USYBL2400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34279e0b947807f18ab72319cffdb329a70f91820558425f2ad3c2875cce797a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USYBL2400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96aabcbe58f124da9b3c23ec8d1ee93d3ce330fda10ef82d6e0c89f9fe75a4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UKL4N1700307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf95b3f85f7e24bd464b497c4e6cd2d31e07845219bfbf38431096cf11634878. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:01:58Z), 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/UKL4N1700308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1dcece8fd14bb82c672e975e8821cf74416858c76a25e46e84a94e63b65fcd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKL4N1700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed99501d74de35011f6b3977fa5cd1f92f9f26dda2f48e1f62c79dbd32399c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKL4N1700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9e90fd7e772fc41f40fb79d49a2150867d8da4b8201834ac5b6daedae28942. 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/GBMCZ0601449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6efe22f00ec1bb7a68f72a82db18bd5ab1e8eba5e0d9b3dffdf9a13a23eaa3. 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/DECY52102428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307450f840031a66f76dfe9ca24f4e58d1a559ed11e300214f32f1fb1cef361c. 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/DECY52301031.