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 0x1d39199e90cffa4b0dea6b7b849d886d0be0acfc147d6d607d66c0066b760bc8. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5149caf-cd31-46f9-a458-04ca363b0667.json and https://artists.proofprofile.net/proofs/artist/e5149caf-cd31-46f9-a458-04ca363b0667.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 0xad7d885657bcd1586f77c98d3ab1fba2475ca4dafd0ea42291d856125cccdec9. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZTB42253621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6b10d4a5fcad5538561c50406eba575827f5c7e2de6be2f9697817514081f2. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:38:13Z), 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/QZK6Q2362937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b3fc294d484e5b4c22956b3c91cf5ce40fabd9c334538b141f7816e0d4650a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNWY2323737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b18427ea5b554aad6891d83dbf4dd0cbbe09ea02e71a0d9653e4f4b34e15f9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTAY2477243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3899a05a30b4f959447bf827498c4449b6c197ba26228f09e3516ca09e0163b8. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZWFF2429471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c96bb4aaf9f2867d3ae638360278174df80577ee87b4e88798630426faa6f2. 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/QZWFP2413761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72400c9f2fe1347f6ddb1e5114dfe4c6d5e176613f46262c7977c9e127c39d3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7R2437699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2752ddf9ad1ebbf16cbe37bf20bba6fb74b934004e154fb7b08e4b81ab7b4c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:31:10Z), 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/QZZ7R2437700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb741f29eca9b5b87863e37161b232af413011102aa4547725651944cfc8f6f3e. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZHN62557177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9f06a3737f585a565ed6146f301c7dabd265b1d64c0e9e70b306486b7eff2. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZK6G2543974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72400c9f2fe1347f6ddb1e5114dfe4c6d5e176613f46262c7977c9e127c39d3. 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/QZZ7R2437699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2752ddf9ad1ebbf16cbe37bf20bba6fb74b934004e154fb7b08e4b81ab7b4c. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZZ7R2437700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31886678688ffef2103ffe44378a8c76ce48345723dfc8bc27d593fdc2196722. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZZ7Q2588441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66fbf29252958f82e17d02f9a1b2b6b5eb33b8cf9b2cc307e3c387c998d4770. 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/QT3EX2577209.