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 0x388ea126343f6e88065bb85ae30c1cee9e08ce41ae593a66b5d9da57b312d434. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d07727f-a812-4c81-bb43-8363af9a0d66.json and https://artists.proofprofile.net/proofs/artist/6d07727f-a812-4c81-bb43-8363af9a0d66.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 0x7a990b1a0912af85e59818a41c213887df50c2a883bc516da7aa6107feb0d879. 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/BEBD41200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6567cfb5da3ff482e61b1060a532709248ea1477dfdd3031379f0af13507d67. 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/QMHG41511002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd06bc2917460cec58304592df841942244855de804110f1ae2e45f686e3303. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BEDS72098703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dfc7dd1fc116c96861d18819d0a50660d08de46bdeb9c6af1fad02f63d4847. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:23Z), 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/GBKPL2029355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545eb56570db9068e5751bd83e58477016fd11622df483445177065cbb832a07. 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/GBKPL2029357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9d43dc9529e6344120f1e977aaed8b95d3d0fd330b6c83d069588152aec0bb. 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/GBKPL2029358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acc9b1a2d84799ee50c5c70aee08f17b90fa57c129a914786b3004807be59e9. 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/GBKPL2029356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89f0e14a0202daf05c4282974735a0657b5df306c7de9031b142801904dbdd. 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/GBKPL2278702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982eaf48f38541a2a3207915f02aeb43dea1bc4fc6eac5bee3c4c663b12761ea. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/BEKF52100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288c383896c0c754e2b08d9ef4f2b7b8c4c208551d4a17102af16df56f98b4f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BEKF52100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982eaf48f38541a2a3207915f02aeb43dea1bc4fc6eac5bee3c4c663b12761ea. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BEKF52100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11798d7ce3bc03f0128684e63c1b74a7c1f24390af5afe1fdaa25def67ead17. 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/BEKF52100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eff89a1c4ec5287a166613314a3c081bd0c0567e0fbea66cabbfefc13e5e49. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BEKF52100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feaaac3330beb030680d57da97739b9ecf84b698f67c4ca047b02c40680276b. 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/QM4TW2322803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8dd5b3813006a514940b7bf4217d726df8eedd446aaf3fc8879fea1d1ec47. 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/QM4TW2322804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e50e02549d478b306e7e130ba9292863401f2c977094c4269bce1a53b32af. 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/QM4TW2322806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f025a6c889045380a940520effbb6a3f40198531b27ce31e61a6a0ec1b984e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6MZ2313198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7102bd1b29da7fb5c796f686782ac73e4c16bdfb353e09e79f3a3bad5faf459e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMFMF2358775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1a6fb0c5f13f26a5770b28a1165cb0a38269fc8a4b1f7f1bcb5165262b26e3. 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/QMFMF2358779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e773f017b397de63906be4d74dc04a0f5bb415f5cd8ce8150db5f0e9f59c3e9. 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/QM6MZ2402309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc170059846150e17e5458c2200eb17a4a8ab566dc48185ac81fb8d9d9c06fd2b. 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/QM7282463328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f4c1994766a8c424f4032b523ed7bb7c1a2e57674edfca09202f4decd442a8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QMBZ92509195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882587742f92c7499b6cacc300c73dc649e781fb5ead3079f59db9efb5560bd. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QMBZ92509196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabecb9a25138ef899da86174381141b8899e75e8f7f13d7c313e662d1c96f487. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ92509197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca843b9395c5d70e9b164ee58f35f7a9b7826ce06bf2021ec54a0c1862f9810a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMBZ92509198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d819837e77537e8b5eae8e4fe058d84b1e3084c0bd6fb1dbe969f546a54f47f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:52:25Z), 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/QMBZ92509199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7946ee4be8302a7825f483128e71fe06cbd4e2950fb29646d65f71468e41379f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBHLW1902604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8053bbaa3acfd05e4f0ca75b6c9836db0a8f9971067ae95e239d2c8025682f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5AJ2000936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c35fc07a75591476d776b7d3d9bbc0d5e18a20c36399c62a49f0c35f511e052. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5AJ2201918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf788a37e24e4a15afebfdb1a79d1b736bec725f91321f4faa44168ca05e3ed84. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYZ2390166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665d96abce54eb411810e744d57966caf204600d1ac775ffbf2f44e5fe4562c3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ESA011925673.
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