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 0xf50a6a5125ed0ca2d1552374843d31a6ef795568915a4bd12d44bfae1554d1eb. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2692e5e-5662-44ac-9cd5-474b4364366c.json and https://artists.proofprofile.net/proofs/artist/f2692e5e-5662-44ac-9cd5-474b4364366c.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 0x1671d9325dff712db3049029172c09f0ff44b678f3be66357ab3d09a51bb1c62. 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/GBLV61920582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58014593b0e9815d347b2c512b9ae386de9d46389775276e5eb6a342b40c95cc. 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/GBLV61920587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779c57970e5ad88530d2406af81490b521b87e7e76cce0ed2b303567d6fb4af4. 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/USA2P1939798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78880f48ceed1943a39f4e735d6e808532f81fc37add599b92af39c67292ef24. 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/USA2P1939799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8469dbcb8a3355b40d0b27516c2165bfebf42146d0b4a77fda835396f50bb343. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USA2P1939795.
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 0x7e6ddb1b5fab3ed45539b66703dd1aa209d7a06bd4d28eb3f35479b4e7159691. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USA2P1939796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f60847b6ef2b27a81c993a59968197bb95ceee6d2799168fa2b2adc0b9eee6e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USA2P1939797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731d29e16b9cd39fc50772fab3c0e74c8abb20bd437ff094d74d69113a4b9c5f. 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/USA2P1922643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8e69d81254499e2e401a7fd0616b62832e7d699920862c97ea9a0cb7d22d31. 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/USA2P1922644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df7ae8523d412b449ade7afd79c76cd30149295fc3e7e4dd54f3c4679e2b0d8. 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/USA2P1922645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4cdb7cf01362ed754192ad271162ef42c23c4bc6f65eac51b7d563e572088a. 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/USA2P1922646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a9b48e50a7b555107ad7eb6be5269b6e3ac65f9406ae6877a252c026393e68. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USA2P1922650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeb144d8c3778078491d4af970c5bde156178eb8423575698a038d56ab7d644. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2019004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2f2295a43596e1235709d99e447c6fb2453e703c3178243eb0a79610adaed. 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/GBKQU2019005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cee14f4e0ffe4d05455f75d5c5eaad5c67ff0dfd1b89e56abdcf27c83b37d58. 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/GBKQU2019014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e94a698636bbbb23418cb725c06c0ec103226c749b1d0141a475ca3aff8f5d. 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/GBKQU2019018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eda8c931fe8d26a152d44ddd78b9b9500511b7ee060febd15be2257f549c28. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBKQU2019016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf57f722bcf8668c506629871cb8f7aac2a81c57f2a5e8963e5b385c16be384c. 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/GBKQU2075491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866fe956076d8a2c32797e60c6ad1ea0b522878319c72550cff790891d99c0e. 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/GBKQU2075497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7452393dd90f1ea56b7157e05ca523b05d07d01376e55916279a7f9b3ead6a. 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/GBKQU2109532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4572898d94315015ca27cd754cd4e3f778236fae628644cdbf89456fe54656b. 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/GBKQU2110910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c68a7c5ea1c525ec43c4bf28a95d23156eba5a7d3ac7bdfa5c6eebff628394. 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/USA2P1932548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306d7be48449192432db61997169148b41ddc746438af8314c9a244d9a313338. 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/GBKQU2136433.