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 0x32982749d8100a575dcdb4df8493943799e4b02e93b9891a44e7f03b6ff4150e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6ec21fb-2bbd-453b-b736-45b53f392b9b.json and https://artists.proofprofile.net/proofs/artist/a6ec21fb-2bbd-453b-b736-45b53f392b9b.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 0xaf08f178e1bc23a7f668af61259c6ad8b7e95b4d05ba75c9f03ac72c6930030e. 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/QM42K1913311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1741b771d80277b2d20ebc42abf6936ce33691e7d7e513f40304a81d34e9e77b. 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/QM42K1973667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ee9357f40a6de09ecc9826b6a84fb24271b5f010603550496f1c1ff7244d41. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:00:18Z), 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/QZMHL2254264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e6988502965321255be92d1d19b52bde00f6c3e6bc37796c5bf6f01118b740. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS672290789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ae24eb7e3b7f7632a15b78a102bbc3609620d8d22d14752d81ceecc2a114e. 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/QM42K2313526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbda5ec4f612a3cfccb8b72488e1ffc34e4feb7634042621c451b2b35e72ada. 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/QZS632330574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be06242537c1b36e2d8e6ebabfd5eb3107dbf96aed91e41cd19814119f1dc0. 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/QZMHP2318466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109bbc562e5d0212268f860c82e5f2c8fcbff58cc933c92b99c0fb612d651b0. 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/QZMHM2383361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2610f36566cbd56b7b111efd38dac947974012c61b6d3657e33da3c4c5393a. 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/QZMHM2332143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5410f356f49db5456c9d6676061f86ce7352eb866522fe0743fd1ec1eb86ae. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:01:20Z), 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/QZS632365908.
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 0x0ece4ae7a9a212377e7262ae7106523e32f2a2369df542ad34564493ae47e530. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZS652360767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf4b0d3c48a3ee15ce79f2f5f48da39e00939724547da3df8b989aab28c1e32. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZMHM2390589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d17cc44961f0221452e873ec1881ce056f35e6864d4337da616a8210de4b1a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZMHN2330984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936ab106142e6ee57bdecef61b64e90c79549a97015f44383b01972d7a5f3797. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZS632353486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e396100abeab324928f3d3e38aec858ec6ef2886aa35f9c38cb986ab8927962. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZS632396235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd038b3032a08d10a7c006da3dd2cc589cbd94cadb78cc4bd7ef3e75536de590. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZMHN2385004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743f674cb90fcb1f25638caed4a7c74783c96aa6caf1d14861a697f6b81abd1b. 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/QZHN82532541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e78e81aac793607cfe420fe5834364c9b730eab88889579cd1485de9aab6710. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNWR2530102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c7b39c3df3edce114f3cf47e6eaba42addc382879c3f6d5171adb7e771d0ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2513133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88b31a8b61722ed2287786988d6be0a6567c464edf3a72724a314f4a09bad4. 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/QZDA42202855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa753d7cddba935318edbd9dcc0980054907f730c78a114ebc98a2c19d68f4ffb. 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/QZWFF2363697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67ecf215584c61bf69733284cb79f4098027d06e70caee814ec04a1c7afdff7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZPLS2232558.