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 0x09faeac21eb6b3e9598520d12d67052ff7e0c8bf1d12eb47e5c3db8d4a4e9972. 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/90c26782-5cd5-4ee5-9a31-cd5d545c19e2.json and https://artists.proofprofile.net/proofs/artist/90c26782-5cd5-4ee5-9a31-cd5d545c19e2.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 0x37174725310cc58e63cc3944e26a22a4f1a7faa358d24b50d397ddf75383681e. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6K2001237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65455b5fe1e8c2a2703aa47ee485978f1ca1567ab190202c262cc930b513b8e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMEM2027804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be5d853f035c81b4d24dcc32f25ca0d4b01345a5f72631bba13c182afe40c0. 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/QZMEQ2008742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9834be14e7219a2c0cc75f5831c3440d4ff730bf222fc1ea026d287321b1e5fb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2090177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d4b00500fc07a86cdb4da92a32fde9f23a189ea84ba12c68f83a63dfcea0b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPLS2037230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e2cd0483e5d0cfe0bae1682071c9e55afd07b7c764b2b53740157c2bd1a58. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZDA82171401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d86230381b846eff231e241b3c2a9b384f92d730c13a87ae26b2a88db9bb3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHN52135319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6a68fbf9c244fa59c2a63e6c88cc291a267c2cb5b2f958927d046b7935ad91. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6Q2165701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240b85f0f67ef28d04bcfabd8315ab7f5a49c43ea88debb038db39e0b1ae9f7. 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/QZK6Q2165702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec9c37f38de976c684e920f133c9825906d7e76f2773b901dec0a7a1fa6f7e5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZK6Q2165703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b03a238f7905435250db700b6cf34fcf54bfb969aba9b7c683864ec8230468b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6Q2165705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65efa005a1b9cc5a96f9f34d94668d4cd1da47706edd0c949bfec6530d0428c. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:49Z), 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/QZK6Q2165706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3f4f5410394ab7852eecaac412552a4f92fa783450924a31aafed3eacd43b. 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/QZK6Q2165708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb9935e3988eb4524ffc7f2518c01de73265c32cef0cdd048df039cc0371d84. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEQ2129286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7b01f17d4c5081699c9355f542ae34396277c4c8adb5fe8d17e42bf1c35fa. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYY2236540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a5f76fec89269d0ac746df299bef1531d1278cd2823a39ad6f33fa40ca5462. 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/QZES82216072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88b911869cb727dd2b109a988ab4e8236e3e39f0967ccb2f3db8f2871a226fd. 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/QZTAZ2272201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b742aa623e4816c6619740fa5d49cb836e0a91e7e243e044fe8e2281a552b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2597449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075635a7fb0d64747193abcbca97262da33f2dbd18f6ae7f3e22c6526784afa8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2463048.