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 0x4a5c5bb09d9176e00eb8f8b8cfb2443cda5375d14aaefbc54732f13d21e76da2. 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/4b2e47db-fef7-4b07-8012-5d040bf9ac55.json and https://artists.proofprofile.net/proofs/artist/4b2e47db-fef7-4b07-8012-5d040bf9ac55.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 0xa9198247cb9e5f4c7324dd8d9eb8ebb4f19a50a560326cf880c9aaf4f75ed212. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/PTQN11401173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9044871eeb3d1e9a58bc29b5ae939b2100d6a7a28a3eed710f02c2fb32457a9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PTQN11401176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f10041f8ea837a83af2b120127e7c051e7de99bf5a00cef787af4d982a7d693. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PTQN11401178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec51eb4b18a1acd1232783c0a3d69ef53c25dfbad77434df2d3853bf8488c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PTQN11401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c70fdf7cc7da99124a1c3183a110a8dd10e33d4c523a281aebac3ddfc6affa. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PT7ED1600207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44089e04d813b261938c94cce91a40c54ec42e53d47a09b599743fa9e45c16b6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:58:24Z), 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/PT7ED1600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a7d95a18a748345554b8004020452637bfe65620711dbc5bb01bb31d78937. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PT7ED1600209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18feb0cbbf526ae8df74e9f8329f6a2b0ad049d0d24e3375f56084180337ebb. 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/PT7ED1600210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd162b35095ac763cf1b7850298906ab4683576b1f590eb7e6581d8d023466ce3. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/PT7ED1600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c374e788aa995af4c87b605d662e176380c878fb11f5772eac7f3efc60c2e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PT7ED1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c402808402c8dba50f5b494e31d853c236d277c2ab391cc3ca13dc0ed11e1a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PT7ED2100442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa562d4b9b9be79e7bdbce636bb672750e0c4ba623e200e635ff0efed4bd366. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PT7ED2100467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78f2fce67bad91bf5618cd8fde91ad84bb3bbf62f85c8693ff8be62722e537. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PT7ED2300817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3570547ed89621ded53266c7c1336055b48dd13859a7a0d30e54901038686a75. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PT7ED2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa960affd2c82baee1b8b088465ce4ba664cc482458eb9bd578399f2bba16780f. 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/PT7ED2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a47a4eb659c9d736e87e0ec5e69cda6a1cb6c7df1269754c59924ccddeed8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/PT7ED2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb974f08c61bee9250ff9639e98d0133e591f1df6dac6e5d8f2bc1e8f14d41f46. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PT7ED2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e723142fa881d5c7c83b3656c14d459c7eebd80535a8d0a4db90f2167cadfa0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PT7ED2400219.