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 0x8969f5abd42da65f4d98c2973c527d73ea206afaa02b564db15750ffcb738b84. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/470c4ee3-9b97-44b9-a7e3-145dc2a1bbe3.json and https://artists.proofprofile.net/proofs/artist/470c4ee3-9b97-44b9-a7e3-145dc2a1bbe3.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 0xd21144186c5c6cbf3afed6103354c75fa966d3cbd7ce8a9d6139fcbee6528c41. 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/QZHN32272631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318f2f22def677b944fdcab928a68610997318a06436ba8e9a22d394daa7f00a. 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/QZRP42253331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7ea73d4bb5d6ab730e431bba861f2f934be27b15272885f166cf3431621f84. 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/IELOI2208787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6eff0c20ebc298c265ba88f14ba380933a24af5c4b756c6dd5dce548ea7e8. 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/QZRP42253332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f44790d63e26445858f929e52ea4316a61f3260ef1e6d252ba02362e4654f. 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/QZRP42253333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc643a04ccf269f3dfb43089a4a8438b8b1734e5f01a24bd80b7e8f7cdd57edc7. 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/QZRP42253334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9737c8934949c7d2390200704e1fc0d810426795d1cbbc0264ec383ec13b6f63. 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/QZRP42253335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d0f2e2bee033d6a25eb99631f64fca419de341954903979c9478645b6db594. 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/QZRP42253336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9a10b6d7e08e9a53e9599e51b03b4becb6f3f5366c517457268144959ddb6. 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/QZRP42253337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcfd7fd699deebbbf4dd8f99b298a9056c5b2169e69209d845504e2ef141ae0. 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/QZRP42253338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca5f48cf125fabb5a36834a47bfbda5be1b3faef7cc195382da313dfcc4ab1b. 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/IELOI2171525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6478e8972302c45b0ebc314297df10aa70cf4ac56ec0ab3cb4c26e5e8cecddc7. 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/QZRP42253339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632eb7e3269cc3484ebaecd2feebcf05bd6b972750a474c3e1ee342fc3e4907. 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/QZRP42253340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71b80b8664cb960ea3dcc278f95d837f9b8773372131a26ff2ec1b733b62056. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFQ2441288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7801f85ef057a688c2a908a3d66e9b65cbcf25634297be8a0fe83cc3f782a08d. 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/QZWFQ2441289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee887d967594229f1e73daee2857f2475a662bd49a7d72f90410f65365e16f86. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFQ2441290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce77f258ef19005dcd90077545c205374ec469d5e0c99627872994bac5ce3fb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFQ2441291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384faf13af320d3e2f4b0d4bcd67a2b17615de7903da8c351168b9cc8d01ca17. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:57Z), 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/QZWFQ2441292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe34fa15a5b834a5a04ee74669913ee6f1cf218f6833e5cfe6f05995d1234424. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFQ2441293.