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 0x1f42f52ef7ac577b5fb5a2d9f077dcbd34dbb61f888460d601b78eb8e135ea28. 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/1769b038-d519-43f4-90df-f9ce0d25acd9.json and https://artists.proofprofile.net/proofs/artist/1769b038-d519-43f4-90df-f9ce0d25acd9.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 0xf15469c9f6f407428abf4e3c0c0d9698c02da0c3d252627f60e3ee0ac73cc63a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJW2414311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d0cb271f2c5ec02dbb34dd8bea408e62ea2d864ded5791a7109500fe711f84. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:19Z), 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/QZNJW2414312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149a276d6f115894d289028e19ac1fce3c07919466a94eb9fe5bb0393073663. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:41Z), 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/QZNJW2414313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde070f467b975740bb4c89f85c66fd5de3d31218406eabc555fdf5eddaa7a49. 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/QZNJW2414314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccbe8dbf898e54c262829d85be0f1f2c2758067897dffec720374810abdefc4. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZNJW2414316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2dfe87e8a23e067f4d445f695c7143e66eb1e7995f5a5d798acd68fc0222df. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNJW2414317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf866a8e8549573d8c40e8bb406efa84610368bb9520e7800196d468e7bf8fd0c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZNJW2414318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d94f45587b90501f11077b1929e3f7ab979ba47eb1c650c50d9e1c273ced9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZNJW2414319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75cc96befb7b4eed7264054e60f6615e65382b4de65501e6eb706f446aba2d5. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJW2414321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c936a2b7b6cceaa014447be0109bac6c043e6272616e1e88aaaca13356f260. 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/QZNJW2414323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7e5179c80efb361b7f1462a6ae29fa9a39717231a1b3431ffc0d983c0bed2. 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/QZNJW2414324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6d1e8e4c4b725a8dbf3325048032fe2eaf5468cfdbc1e3aa4079a4cd6021d5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZNJW2414325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77be30c9475a0e6175c0bac32aebb66394074d3db556c22f9c055e62f0090d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJW2414327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6401dbe6a1654aea31d66422343d12dd09a6976be7ef19267e0056ac51807038. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZNJW2414328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d548fc6be5ab55fa75fe85a716f1e2004c7e88f1799245293f855397251d2b7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJW2414329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aa55404b79b0bb3302886aad16b2114ea9c37077e6389cb6da75e7073475fb. 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/QZNJW2414330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4079258d7b01dd6c68d687da52dd9dfbbaf924832d2cc309dd9b5f6cc2772e91. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:06Z), 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/QZTPX2569474.