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 0xa283ad59c9086c46dec042e5b20e807b60dd09e849296bc568e4edfe3d877500. 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/e2293edd-52c8-4b53-a0a9-14567ec98b58.json and https://artists.proofprofile.net/proofs/artist/e2293edd-52c8-4b53-a0a9-14567ec98b58.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 0xbf0be8a4a9c77a0596e6f3f9f6b5f21e755a7731a5fffacae61ea7a5e7c0e110. 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/DEA621502036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc059c80f73a2f8da402628408971a363aecbaab95f5e2b8bae37787bbf0edb96. 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/DEA621502037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7b37c8805cf6958e7c14c0e178a0dbd4d0effde933bee490ef48089ac658ac. 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/DEA621502038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5b2d49be417261a152015c9f74d67ba5ceba0647453626ff3ab4ad4bd676f0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEA621502039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbaa7155d9e1df13d98df10463f2f375f876611afbd2927373bbd15045e7142. 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/DEA621502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06bd2c54a74cd90ccabb4ae34574dcbf15db161cd82cbdb8d5f28e18ee0b522. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/DEA621602233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86357ac1656046ffbc02195606c670ac86012ef3b972e9997cb588cbcf911a0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEA621602234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c18ac41d64f2e077fe2b3db2b07900ab61b6a147ef2fac0a9092d3bc8e450. 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/DEA621602235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9f382122fc25e2a1cea66870e0404f5a42cf5efd23c4bfffa3854b4b4f1679. 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/DEA621602236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ef4f2b292c3db1b06b3f885f4a37a27bd16738ab737b75f243f7982f877666. 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/DEA621602238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2812d6bb053aa35c0ab2248af58564ca8689555f04cdbd3b910f40d37d8eb57. 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/DEA621900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087844fe2c4e303ab05de974da78f7cd9d59b40b3ceca0748b9a7cc4cd8181c9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEA621900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c435a89ad4699361b3e9b53dccfa903bbd3147e74b6bcd352a5b010bc85d35. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEA621900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb081e46e619dca524337fbe1d88048c43f049e71ddb1dabb6264d9cb400fd7f. 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/DEA621900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec34276501d1b04505f953aa78054abf9dd41b793d03b3e04e6f3cb78f2e824. 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/DEA621900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3d27e2ab4aaa5e6ce38a404ae3d51e9bd0354729c69127160ea620d6e82b14. 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/DEA621900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cea525f9da80b9abec88923664b82db8234397b038fb81a250f1e36326ef21. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEA621900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf362f188f488a98e8ea9ecc880bb857b054ef7998201624aa1b541b0a440b0b9. 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/DERK41900124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94fa161bcc44301a95334deca86873f380ecff75838be0a5e692578f5038585. 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/DERK42100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08827165280c94932ea47ed33b262c1947f867f615a5e55a083bc0e948559577. 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/DERK42100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ceec760033ce9cb17dec0e82426c844e4559081db0122436bdf2c04ad29187. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DERK42100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c54d799961631e99204dc1a9df79e8b6ff9fe86c189702230e8e53866356fee. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DERK42100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3654d2cc308a35cd528b9a2fb5b1d1bd2a0fe96c0cce75d5937e0f4e20ba1c90. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DERK42100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59efac73fbda533930d5d742493d7f7f700de541f462948d8bdb186c0da0707b. 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/DERK42100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72527d15d7e4ef7da452458cce5ac019beece02a654ef5ef7cb9c7377f37b8. 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/DERK42200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024d8384d24ede26c028849a700871da57a4fbe1562dd2deaea86984567ad675. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DERK42300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe796fd04eabbf121e16578588ebc1b45e5eec0df8cd6042c47174e47221fb. 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/DERK42300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0077f6cb47c6aa4d767c90d18ab1af87b3e34b9d581074837e723d963c841d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DERK42300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5539f9aec7a6ff20ef7d02db0557861e111153981817281fb8b18a22ee749846. 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/DERK42300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8516b32e6270d37a81bed9646dd1b938c42b02bc8ae9d3998c2e16b204cf7842. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DERK42200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ded4c73c06cc5ef91cd119f2e97fc1ebac745aec542166d806ca2205bb6195. 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/QMBZ92546974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf81fa442f61343a63ef614a749ca4e9d9a11c5c6623b22a6bdc90e6f2059bb. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM7282586594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83a92a73862e315fa16f846b66ed7f610bb88515ea55aea8181e64c59deea48. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QM6N22545550.
Wolf Biermann RE:IMAGINED - Lieder für jetzt!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561fee52ec09aef994c0a849f75d7b4434fccdf77b757cbfdc63ddae51d744cd. 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/DELK22400030.