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 0x045a332f4482dfce010ec142554f013ad83391d762b65c56396771083c7e1c69. 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/12bda8ee-127e-4d7f-b439-e701fd2d876f.json and https://artists.proofprofile.net/proofs/artist/12bda8ee-127e-4d7f-b439-e701fd2d876f.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 0x11e2ac297cda93cfba49030286a97e0579b9214a4ceccdba5f58e018367dd69b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZFZ32426671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab522277a1783856f882da8c1cf14b2d75c2005f48e313034bf3ed570624469b. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHN32413051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6588c3b9c42cab8dbb67ee9939e0e62da4171faa502d058f6f48008635cda78. 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/QZTB82469213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c1ccbf8995571657f2455636bbf46027325fb4b598ce820cb22e3a45aaa134. 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/QZK6G2530762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85ed9d5900365348dab2c697a90bdfd797ed8cca2483ae5580f3e208a736e23. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZK6G2530763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73032e102a2fd3675fb2f494aeea36ace7547151eb25f7da2e80f56a808bf2f5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6G2530764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382376fa53b9a79ca53a167fa18d7f98a05595a3920e63d106e745b38d5a7240. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6G2530768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd622628822d71078752f0627cca3e27506b0fb97bc64bae111917ef4f6c31658. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:47Z), 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/QZDA72533064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c6f50cf95c630901dd99f99c3927483e2c7d302ca77bfc175585c4c2c04fc1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA72533065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf116f38e7e3c19be63a40501d4d6fb6ab092fe34393b615b655f81305d09cdff. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA72533066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05e90f7b476c27ff9ea170303e728739a0cc2e14a60c64b4639832e2b0da6c0. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA72533067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5637c4fec1caa23dc5acc603784e9f1ed835b0d1d4db0880b48d3e75f60d1c03. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZDA72533069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d71241396cb6a69b5e2ce893e1774e7c8e519918dc9de5b6534d9c80158b4d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:50:20Z), 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/QZDA72533070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e43c990d6e0475bd47bf0d33261907853f31b1c93a464e046eed9d8d2dd1c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA72533071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ce214d782ee26fa14062e495b714aef5781e04f6764e710ba3561cc122911e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZDA72533072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77235ef033411cb5badc06fd9dc9d4896dcd4b20b963eded888a63293f41da86. 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/QZDA72533073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b155aefca77377d701f0e7a1d4cea2d3100cede58123bb34db6aea2a7426f3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:47Z), 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/QZDA72533074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963911b4019c340ffbf22711ca9fba9f8e8faa8e5387ada8f63ddb5f2dd50edf. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZDA72533075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f92fab563ea8645e532a2f0317bb7e0f659e358ddfca92eadaee182b4db6d8a. 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/QZWFJ2325828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4bbd821c0689293ff193fe2e2d61225edf05aa91eb8e10dacc8d81f1f3a56. 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/QZWFJ2325829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535f9367e84ff41c2ad63ed6fa7292098b08b7e7cd91d8ca8a68b72022e87528. 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/QZWFJ2325832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb190b937bd9df994d764ab8002928f0a356d8289a6e3a5dade9b060584dbe. 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/QZWFJ2325833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec1b047a658e209616347120fcb75a14bad9b7167273dba80275084af6031d6. 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/QZWFJ2325836.