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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8009ba27c5838dfb6d3512a75869f181749853efa64efd7bbd51b949265d2e2d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f34504c-b2b7-4fef-b30e-9bec9c9c0b26.json and https://artists.proofprofile.net/proofs/artist/6f34504c-b2b7-4fef-b30e-9bec9c9c0b26.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2123dcd2f0c40d9147054a5b6dde7b4631d6b6c37cddc87b1e70ebf689de951d. 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/QZJRC1945654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd9241de51292a833a486c262c21280b8a2af077a26b330cc9c24366a30fc84. 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/QZJRC1950941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55613ca27b0270be5152ae9e7d598405736a9f7d84f5bbaf273bf2eee9159fbd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QM42K2063749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d36a8a8b3ff6b9f94565be5b52c66a41411ed171508eec37266ae2b435794. 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/QZMEQ2025988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9c9149ebb2071d52c470381f1d8289441e8133547ed03e730134396740bf06. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZFYX2122867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e22b080d5b5374d59de152926dc76d3ed363e2b37f822129a4687c95c0b871. 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/QZK6N2066959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69629fdeddac6a67f062c459feb2a3fa7ebf1f208130f15b75e328986dfbf8e. 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/QZDA82170403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7959ce4811366b8b0a8894bc6ac33f8c170889eda17a08880c789a3b050ace. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZES52166890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88886a21e240244cc2c6f96edebabd0ad0063a88b60015443c35f2676a8a113. 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/QZHN72138704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca319ef9101d2c1472ee75a6a8121f11f67776a25b7298bb61dc2250f71bd000. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN82158613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea481b06caec22a52df1fabfccd87485e444725678108b7bd080b4e1c74e4165. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN82156717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d2bb7bd84baa47bac8ac5fb72cd95e27ed1985db194a1159f1eebc8aeede6. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZK6P2113060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6b0a626c37f4bf9ee3585301930ff7f2a0682cab2623becdee350aea4b9ca4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6N2120323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb4c74a3cb38c2f6135fd280266cc182e6c23f53c26bfd96d49977315797e6. 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/QZMEQ2212096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12dce4efa4c5cf0773450e310d864e29f53e1eea15b0c9f2f8be03a83d91d6d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZNWS2251038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e12d6e975209c36f2b66fcacd588042e7070e55dd6faf4eb8582e137a6177. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZNWW2285516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c38c2e94eee0877be5ab0b6c533eab6262ead49d4f91d83e14723ee6944947. 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/QZTAS2281781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253d1ea41fc721e29846b5cdbe6801c1b50c0e0407f8824ae9be5b5e3affb055. 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/QZTAS2249496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdf38150cd72aadbefcd85348c71831e4f1852c64876d52f2c543d049375903. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTB22290371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8529c6aa5a90b42ceefaaf7004bc1c0d68445727a318a00d281ba4da842a4bc. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ72346374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac93735fed532c80c1d96d05dd36a7232d7e7ee49ef4d9402eccfd782385e5. 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/QZTAZ2325520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70559090e30260e68d79b8d9e496b868f9c38ac66dfdeb6b51fa85380c2b3d65. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZK6F2384314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03449f0f96b30ee53674fc112c92c9b1428f002b18017213123a1e17fc58b711. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN42433047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ad3af8b3591cabe5724ef77869b797ae348acbf1b5f0f23c22ea24b640def3. 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/QZHN52453732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dd351e609890898af15d3ad1ae5be2e3b657fe021d8f12ff618b43c246ec2f. 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/QZHN52453733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b4776dd6b9d03cada410b6b5f180b58d68ed0e9c8cd0a180151725775bff8a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN42433050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae573d58ebfcf54ec5bada1b4b42e510d9505bcfff624fc02a72dd9c4e5c06c6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN52453734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3610a00c49edaa8f6befe78f654e0763244223ae63a7ecee97defcc6522d28c8. 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/QZNMU2422148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a6e370d42131de9c318531de0b3cdb51f3f179b839c02250144df4582794b8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNMU2422146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013d01438a2f5cff375a672140c0f1e6274efe245ae143c635fbc84b416eab76. 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/QZNMU2419629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46a0707442bd47a472e3f672e7528cd6f6f952317a2c83f577db4795a0a3cb5. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6F2166748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33aaa8817fda9249c3e613d4bd1cb927db42e0f599a220c180f10ac738c07bc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPLS2296697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5c11d0b936e50bdd61968c18ecc8c2244abe5ee6c052bb01f2da6fea47ed79. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZDFP2150610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484b4593bfdff9d40919bd4a0724080a15f1e6f04fd20fe1d3b7018684116fbd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDFP2150612.