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 0x1ea5b76707b6793c31ea8800609c86f70122d7858e49d2138df01954e4142f8b. 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/9148eea6-fe73-4582-87f0-29033d61ef48.json and https://artists.proofprofile.net/proofs/artist/9148eea6-fe73-4582-87f0-29033d61ef48.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 0x03b0c58ba69710d30162a791dc03b101cda638b9eae6d10a27b42917ed91e744. 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/QZFZ62053936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52443946e8a54e83d14185acaae54f27123dd224238385ed2651fd4cdd73709d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ62053938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e06c56af9d17658b07e66246d6f7684f15ac329111dbef72a108f62dd87d9cc. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:32Z), 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/QZFZ62053939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c33b3a32a31cdef6f05496d5b3e8f57e50caef8d9553d40c2f7921b5911f63e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZFZ62053941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bb7540313d39e7a026304be8d3fae782ae9320b7d53b9d19e7bd4404ee3e5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:25:48Z), 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/QZDA42012263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82319e653cf78fcd5fdb061682b40b7b00b95c69a652a93a4e990af9bc2b5196. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZDA52015867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcdfb0d80e47796b91ddbc03cb7677ec02b790126af05d90335d23813fd7b0e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA52015145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e2d0b86c99acb815ac63d3602ae128bdb16ae01a55bbecb2ecbe49facfc857. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:58Z), 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/QZK6K2094308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84ed667b786de382050781eb41ddd0a3cd8b2f028f97938e9bfcc5ef97fea7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZK6K2094310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8797951bc39c7afe0f1cff3f76052d0e21e40f82d2c063b35f330be52d58a2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:58:06Z), 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/QZK6K2094311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6fdcaaa4d1e1f592d679d25287a6f773982a72a29427f1a2d44595cc4be4dd. 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/QZK6K2094312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7618f75e373afc397e8117a223b35d50dcc0bea575ff6a9a743704f3b2d8107d. 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/QZNWX2053704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ae87bfdb4166fea6acde6b3ba96c92972af2b625b00d02b85d96a66c3689c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFYX2133854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a6653670e7cc727625933c622ad16b3aac47612b274a95f93da7dbb59dbc44. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES62170380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a782ff8f46019d850ef58f4e8b399fc33b832093d53173c65bc95c9dbbcb12e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:42Z), 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/QZNWR2104164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ce6fba22accf284f746b99dd0f274007499b23917be15ac179d6a7b6a37273. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2167887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5fbc9c9475944671654f48b669dab27ed81aa839ec232a6019e1e57e32022. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/QZRP52182663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4ac84ec93ed695510a966ebc5e5594e7ddd3e25c689c16cd8ec1bd6644b74c. 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/QZRP52285685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e38c8444a4063f8c5a40bee74d52ee5a37bfe4539d5a2e233b33a1fbffab70d. 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/USA2P2261197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335081cb1dd5304b39dcf326a904ddc1006df3a74c8ddc77e052a75cca37bcc4. 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/QZK6N2476717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d3a1f88c13142aa0e5f9a89760ef3c47b5ddaef261860551d86e9cb5532b28. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES62423333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f01f9834ed5834e4938d716a2824070a886cffecf461ac3b6b2b4fa9df715e1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:39Z), 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/QZHN72450613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335081cb1dd5304b39dcf326a904ddc1006df3a74c8ddc77e052a75cca37bcc4. 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/QZK6N2476717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eee9d7158c73c57eb9fde2e12820694b2b3bcf9a38e1283f9653b8b4df2898. 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/QZNWR2453189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bcdc4c726e148a50bf4fa4b811dd7810a5a0e761701407dd4058b400c9bc4e. 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/QZTAU2417404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8152019794c31974162e7dec158d48482fc090e1a7b6246293c78c62d52229d. 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/QZTBB2568984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485673d6672b1b541afd20cb7f6d7d5a3e43eeb16bee5e563e6127abae1bc2ae. 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/QZZ7P2545705.