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 0xc49a2883e838a5b666cc38f374651fd8d92dcb82eb0430b23d3ee84c0bba478c. 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/a920cf6d-1231-4127-8d93-0624a6b00b75.json and https://artists.proofprofile.net/proofs/artist/a920cf6d-1231-4127-8d93-0624a6b00b75.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 0xe1249628bc70f8b9dcbd01bac9201601d6e4414970dc538a5a5a8db85c57b62f. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BXIV82223758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b3d0673bf3b2cb386708283240a4829b4ba10e899ef2a01fa22a5332a107f3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BXIV82223562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42512802b40296a404849e2b7e0e09b056696ae79a61985e3eaf89b863a7de35. 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/BXIV82254285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81fffe44edc6e8c551d0349b33af384514e5393b1f6eba6c8ad120d838f0621. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BXIV82206435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00762bb29d446260fe3c6dd66429350b785cd573e0c51811979c449709ef0b. 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/BXIV82274636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c0d065fd608429c2e5162b920ef4ef14edcbd1e7fb144a8971add9384d3b0. 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/BXIV82244586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248539adb22a34e51228b80daf7757a00fc2366f89fe27e820a2d55aa7fc71e2. 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/BXIV82270243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc6d57810eee85e28b726a91d083f2788f318a9c1453b5321db0b31c539408. 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/BXIV82237975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce52f5c53222e2ec61e82ccc5eb3fcbc6c310812309e0850fe5ceb7d2b01fa3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BXIV82228869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c1ee1333a24db4e50f397e52daacf14009cb237bab3f27bdf83a7c5abf2df. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BXIV82250850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04673cf420a40db7427e8711c07178715420f5ca5ef69d3988a3fbfb81a33f9d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXIV82271002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5ac9cdd60db558b3434485025f9d35f8a2ad4aa8f3bfe834cd63d15523efa8. 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/BXIV82293214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a163ca8a9c96e8ecbc8e039cdedb8a0bd4fe30a843854d53ea212f8c213abb7. 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/BXIV82244053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe341fdd007bf144fbfbb3d06c421675a39be23b2202a8d8e8acbeefb833983c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BXIV82257464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54686835cd488efd71061172eb4adc4df7b279d986793752c5e6278676d00c11. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BXIV82286710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e46e081e21ffc275c3208f356f11f3bc2ba24ee23e90ca3e04832fb05ca7d1d. 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/BXIV82352092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082d530dd8d240970d105cb6e03f7227855f0ee91e2f00c2e2a1f3726940bef. 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/BXIV82358075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f6d30d43fe9a36c7f229dd66ea0f9bb2f5ad1f5db1ba5a2dd70ca5fa434137. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BXIV82340347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e07a74faff0452c9e2829fcb2635e970a9913866f5ce4558293c916693f61e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BXIV82338032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c15d7f9e6a0eef2c905c2120866a6181f7ad1ca8f2c376c1d749071cdd9479. 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/BXIV82339587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50b5a5d1659eb5ea9607254aa5f03c35dbb9f41cceb39be773229a77859236. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BXIV82307740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac42510dd145f43af146d603c520e4d491bd0c0da4876d62be3e2e4998af50f7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BXIV82364559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ad54aeb97ab9fbc74de2c895dde5fa1f47775414ec2210ef1ee3599183048d. 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/BXIV82362477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724f8dc848031b0691e85976ae815806c00fbb3048bd92bbe2d751b835781955. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/BXIV82317359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1836c2b1a1b5a4dd8bdf781453d600d79e3697ab7286045d9a974bd9b7eedef5. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BXIV82327694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed69cac623254e6a3f102ccb4169e35ef1c1297e32b4100085b76e31fc0e10d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/BXIV82359010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9730d5df16ff114a76f1df7ec0a0af4bd01e2b6fee03aa088f9fcb6b472f537c. 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/BXIV82347586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b69b8db5342564c559a6b6320200d13d6c38cd9f62ad1382f321d3e8ef193f0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/BXIV82363481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2940969a8b16bd8cb68e2b9ac9b83e09e594e9a6b62c4d1fa50329e0acffbf8. 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/BXIV82367858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb76f85251af7ebca3a2901436b024f9798baa987c23c1049cbb6f8121b784. 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/BXIV82311794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a5d733eff3b48fb2b5a404f022621b5012a115561db828dc4dbfc695c25d4d. 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/BXIV82328413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d1229a162aee0887a8ef4388763d4ba35c110bd64f6bcf170076187483319e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXIV82399813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803114ee15b92ce8df11e630c53dc245be389da7ea219e22cc9799142ed06641. 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/QZTRX2442945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109fe449e55de97f404759f61794210fcee3fc21fe87b63d8fa8af49701cfc6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTRX2443715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e81a3d214596db828d2cd07dfcb23f413b23fe4b32b15c56ae023c6ab03e920. 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/QZTV32506703.