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 0xf110280f8a8904b8241fa197771257aa61c6fd9cb8fba0b00e5df3d7374509c9. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c77c1d-9dfa-45f1-a31b-ad54d5bd92ef.json and https://artists.proofprofile.net/proofs/artist/b4c77c1d-9dfa-45f1-a31b-ad54d5bd92ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Aemeralds presents: Library Aesthetics, Vol. 1
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 0x3e2c74d1421b74096930f107d7442a0bb92b1c628ebb9bbe7368c660db2bfef6. 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/QMDA62204990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa358b81bf0ba4abe6ad2688cff97604820a7c92493945c8bf6e05f47cddcdf0e. 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/QMDA62246566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2aa2aabe5dfc38c41e31a101f49699beaca5e363263e3d519d209376bda768. 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/QMDA62260781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167b8449746184eb2cad0fd89650d90a91109fe455309e30d9a327212d5994c8. 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/QMDA62248493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff28f1649d2e35ced33aa440055113a2679e32f189c2938716ec6e5c40373f9. 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/QMDA62215580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d38315333d69fb4a4c45ee4f19c7e4b93ebdfeed815472830784d857228d94. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMDA62215548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12eaaf5f497f2239db569687677846c689024720106217f45e03f3c3667ca0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62261856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc1e7fe5bfc595f215298824b3d7ef65a849774eeba633a4eb1ee0fd588940. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62230559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43b3a9a8c1f757538d46d29214ea1f6793a788c76abb11bf40809e4b1bfe102. 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/QMDA62234098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc60cd089763be77ecfcdffd8c8eeb3fd8c8a3b7faef3cb6e9ff193df5cf233. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62262219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046a4e203eecd6cc30c048af5edb18536904e7e286f5c4081cccbb1d46cba53f. 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/QMDA62253985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dae1c20c7e47da3df3ddf45fe27df88a98ccaa85742750099b8336ab3966ec. 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/QMDA62261933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9731f2add507004beef7a072db81a47d0f8570dd5c860f4f7571630ad91280. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62261784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81237cd31c86ece16ed17d522416430dcc7f857487916f2492279fb258c7cc2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QMDA62248492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe681545b14b68d6720e33f27dbe1577f6cb6f80eba9045f3ddfa3de8b90546. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QMDA62258111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53f76f88fad9bfa0b78721eabefeb221f385c45160cab633b33524869a3e81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62262295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf820b79329e91074e0e039add10ead1c81ca30f6a6cfa81553976fe99576c7b8. 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/QMDA62261803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd02627bae6b978f36faa013c19302e637f15ca954bb23d3bcf9b666b47d56c. 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/QMDA62261980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21f8dd43a6bbdb5a94a5197a0cdb5b2569d9a931fe44c732734d2200dd4945. 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/QMBZ92280117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfc15604a8859b93734f3ec0186590a5365ecb7aa51642ba406a9d7dc0f8c04. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMDA62248508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3a6333e5854234f3d2c8e2f8264656803543d1250f56061b28a042d00eb62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62247216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9793fa612ffd48e8512879b1158c46d8af5dcf5ac57e71237ebed8d01325b0ad. 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/QMDA62258315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2447a44051c8540137dfa4577f67fd433c2c0e8d6434d55a18248cf8f9408b86. 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/QMDA62250640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca8738041fa1b073ef1a8909424d6b9bf16f0cda1441bedfe03e829a38dd758. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62258254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082fb5dc273b6b3a64cd2c97d9b047c476bc0b77baf046c5067e4663f5724d62. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMDA62262261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3247ccab191e9d10d725921fed1765f758edbb8d310899712ec3e0dbb2ead7d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62262275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dc96224ed053ffc060427cc780642999eb53e4d8923cec1727c5c873ef8e94. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMDA62248491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b3648fe53626bb5303aafe107a2af85b1bfd2f71b418a7a009cd8ee22c91f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62248494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e577a91488b1e009ef4eb1bcadd63fdd66acdeaf9bfc2ae0f4230ceee075d71. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QMDA62261878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06631a6977c72c114b0d569a7a84893397bfe72e7c44b9646a07ccf7c8bffd25. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QMDA62247242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d5ccdd43d6161196fbc4080d24599f5a9612add52e6735514b724148081c68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62262310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32917f37a8e0c34a8d8b74b00c65fe4ae1ffca8bfd445dffd6d01656df4c5127. 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/DEZC62268052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f5e372981acec28dff8f262e81663e0a1f60cac36cfa89a83c4807443bee2. 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/DEZC62268053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6fa5420d75b1961f5ae4f81dfd6357e63a8391f6b4264af03b3d5ce9e6fa3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEZC62268057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270798ebba72cbb421d6b11117b228a407ee0f28b80307fc3fc559e23b7578fb. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEZC62268058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570a9ddf70c63c796f46081318de89fe48df141969fdc84c2d4062bb09aadec1. 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/DEZC62356476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895467f6b63728556629f5309dfef7c0ed88c04c59f162454b0fc62ea730e5a9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEZC62356474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32917f37a8e0c34a8d8b74b00c65fe4ae1ffca8bfd445dffd6d01656df4c5127. 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/DEZC62268052.