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 0x6c4d09da92e245d9020ad46f270e153d0d2733989620dbeaec8bd531a4f6f972. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/670792c8-0499-400b-88f1-d402a67994d3.json and https://artists.proofprofile.net/proofs/artist/670792c8-0499-400b-88f1-d402a67994d3.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 0xf94bf1d227900aa66a3b8750a594f18df3b81978aad689b245cae18d254cf887. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UK3TB1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50599f1da04d152d6c7708d5c6df8a94ae74cc85caf18138625d5b4ce8f18ce4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UK3TB1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272255b7cbc85140d03192be56346fcd9c879ce775af47d5879be9c77d7bb192. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UK3TB1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9af153bc242ae924a1a782ba0289d0bf42f6a383e828003fc8a8e558de8b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK3TB1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ac3bbda5da09305855ebaea2cd222b469060ebc814f040fe049432b418145. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK3TB1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1117c270311d523de5dcfc2d041b2a915e6429ab48efc4f17a859c8c6200db3. 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/UK3TB1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c6385aa651fab2367a9c18bfb249709c6394cb79a9647535f8c30b2e946fa9. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/UK3TB1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec3983280cd677575622b23a54c34872e64b31b247b8f201c71e7dea9ef342e. 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/UK3TB1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b62f5702cd4a12e2bb98352dd88f89935f8d21591c2e162160b883f7d149ead. 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/UK3TB1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae5dcf671e0637e2d814b80a892724d2614544f9d92aa8a39655288b0cd433a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK3TB1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b104e96c62ddb9f3489871af941e951beeb0b9c014bf4c7376da8d404e871. 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/UK3TB1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e9569daecc346bdc1ab3158f4069d68067b0eab3786f2fded613e67a96b31e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UK3TB1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe2050460bbba341683c6e2963788e4b6af61e37133dc2767edb6acd9c8ee0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/UK3TB1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88aed839c3619e5a3c8ad1748cf55b684387cef9ed854108069be406a2c5818. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK3TB1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d09ce3faf66a49ecb984a8440d4c6cecb1fadb11b0975b66f1e0abcd10a8863. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UK3TB1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb550c445985ab82fa204414b9af13c1414baa01261ffde236cb53baaa7185. 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/UK3TB1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25e347fb6c124221bb80b68f120fb8a1615d698d465da22507544726bc648d. 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/UK3TB1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cfe6f080a7442ac0cbd8e040e8030a9213edeed1f8b1b60eec9347199fbe26. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UK3TB1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87f68bd26db608aff76c217f039bb78ca87216f97471b3de3b91301fb427429. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/TCAFY2199191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88aed839c3619e5a3c8ad1748cf55b684387cef9ed854108069be406a2c5818. 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/UK3TB1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb2a34c5b3e4837e6828d16cde5288505b5f7e343f88a8edb4b457dcaec46c9. 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/UK3TB1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c8c03e06a4dea3888d0b95f0178296524c3e0ebed54f51ee6ff50a8d11c0f2. 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/UK3TB1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa263410698201ed3ce9019d8c060c7f769001d183c294213fc43f12719c3ad61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UK3TB1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605f6f6121c07295737b4129d2f5614043aa3da12e40cf5ac1000099fc0ff37. 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/UK3TB1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378e4e36a74c259dcf8a23f6faff1d619d65497fac95dbb1f79af29fc3ff3233. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCABD1226488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90479c7de521d2bd53d1099eb4d33fd3b993f64c8288c749694ecedd67c803cf. 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/TCABD1226494.