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 0x9c39fb29c5ef112cf45d6fa5e4f6afd397d608b4614e2ecb3364dcf62f6ba820. 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/6936df08-cb15-4432-ad92-e32c38f25ebb.json and https://artists.proofprofile.net/proofs/artist/6936df08-cb15-4432-ad92-e32c38f25ebb.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 0x76fb48c9e99ff12a69597df8c85b1f92b84207d5dd8c6159c0647b750ba1ab32. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEXX22100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab34dc3cab15fb3c5cd90205c1609d8b39626f0fab94615741d814e7af28607. 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/BRMCA0100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4379dcd1166db19cbd8e4157a35907ff78d623a469bca7b43ce6a7f7bf947d4b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRMCA0100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ccd706086895b6161fcb06a0cee891f8f2376b8862391f580ad26ba7fc32d0. 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/BRMCA0100186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea338e5ba73f5619dd5c63686893fd3a5248327f6948432010b331d667dbc55. 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/BRMCA0100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2a910647a27fd2f0c7c7002114432ba7d118cf3a5dce68768fef5f210d8dc. 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/BRMCA0100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf675cf88a57e2da41cc8a6ffbf5518072ee28a7c8ee731ab1983b240e6459df9. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:55:59Z), 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/BRMCA0100185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8878ae0e28f80c9096efadac1beba9c06b7aa16a6d37dea449e727af3e0b3c. 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/BRMCA0100188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d77a7d7f20a313990205802f530575132b909b5831864e5f1701ab0a4e3efe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRMCA0100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5218524b02759ee8cb292f5194751832d9db8c21a362fe149c434f89fcd40c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BRMCA0100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd9d8b2d75ce992fe948811d02d7a7808a16e90d2ab78c317b7ea889833464a. 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/BRMCA0100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67702bc683c594d0590776370fc9141a7fe5e2ad9b37628238352f1b2d3580d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:43:18Z), 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/USCGH2383429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c021c8a4866aa8dda5dec2aef48c1602cb057b25b9d2a546afed7e90c1a8d. 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/GBCLQ2100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a26ecd9a2037e964b159ccb88523c65051f9959731163372d891e86b5ef7006. 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/BRESM0600331.