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 0xd4af30cd335da5fdc1733572022df3911d41195f038b6c4e0b8272941164abff. 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/637f0158-b469-4b46-bf0c-299cb2788125.json and https://artists.proofprofile.net/proofs/artist/637f0158-b469-4b46-bf0c-299cb2788125.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 0x2898c2a2c095f9d85a5e71af549930d9b2e28453a4c7819a3cbbba2eab208c09. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEA347400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d35fb65c9fa635c22caf6d09fdab8bf37bf97343c7c7f6bd5041da8698563a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DED819603830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac4382b8f7bac217167fef5ac443ae38255797965a3db2b3aa04ba357299ae2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DED819605510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b42bf6ffd2a4e7c27da872dd7488bd2b204a20b9619cdbd5f23079924c96e9f. 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/DED819605540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040f88ad2fe017183fc7679226eedccb24abc77950016008ce1060cbc9c30b7f. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DED819605560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25099a64f9d8c51f096baf0bb171e847cbdb90c58d8f419529fbaa0f17bb76bf. 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/DED819605570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90585648f0a0c35bd54498c43052a0247d83eb988d454ca4edc1ae320661e10. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GRHR11293303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e580ab4c92e99a9368e3fa41af8760a1e5ba119391e78f555cfcedce562c0. 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/GRHR11293306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa062081cb2fe4c7456cbb85696b1eedcc4bb6e882372378ca68d98a1db46fda9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GRHR11293307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cd4e2ea4a1486b1cd561db6a6215d21701a1f5d0503ded8b5f7267a669cf42. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GRHR11293310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c82333d542861685528b5653f916718ba131ca16b42011bcf67f4c9323d08. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GRHR11293311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23dd29045ee2e2af2ef9cfa464e253b310860497e0b36eb101224ad16a09a09. 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/GRHR11293312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193abe802511b2669d997768a558fba84b7fb1c094f47fd141700862338c4fa1. 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/GRHR11293314.
Marschmusik Und Marschlieder Der Deutschen Reiterei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f9138f43a836df65753ebac32213fde83d3a16b015138077d44ce313d8738. 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/USHM91373912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23225e65d17feaf094d8470475703c72f9050fd7aaf58604ab00fb08161d1b20. 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/USHM91373918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf54e5072c43a49d4cbd6f27131017d3336661e8fa1791563c03e5982fa4ce40. 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/USHM91373919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aeab4b513206dd5699a90b9c6df58bca1a2541ce3c34872cf9d81d9a4fc3c4. 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/GBELT1207958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fb3e0893086fd2793de8d2b809a0ae66db2756fc37bde2ea8aae88eb13d496. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEU241079988.
Die grandiosen deutschen Märsche - Deutsche Militärkapellen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140f6eb75460dfc1c7e7ff4770326f31c0f12fb94fd0c8c719842a1480b203c3. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ATT251902550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a88842dc7c4614d9f28e03ca2ad9970733342cafe48e15e00da865dd5192939. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ATT251902610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac637ae6e1f74a1ae1b6454dbdf7d4b1758be88cafa732aa562ef100f2b17442. 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/DEU241079946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7af293c1dce327b23f18fb16b975839d415db98f33373a4aa9c41d23b6814. 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/DEU241079949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9455ba793d1172e126c4b5e6cbdc691fcba23ca55390ed11e144800b215ec7e2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/DER751526801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e3f359e0eae803e726c65b7bc6a979b86c32671ece8b222e482bce94ef197. 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/DER751526804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05897e2a07b65b36c90818739e901f83c223ad561e1a169a60c75f64afdcaf3a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DER751526807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2bd94ca62bb4381ca21b7465a499e20bfe80b2a9eccec059300f08fea3e574. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DER751526816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5dae8c5cffd793a2c7e495792cf4df156aeb2e9d50348d7678b887aac0bbc. 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/DER751526822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9b9c36457b80be21ccea0e22b030df30a94ea1f86115e8e560abfef4180698. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DER751526835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3518cbc05730e137ab5ba69ccf2592969b9f1271f7bebd33b1063b24ad9d2cc. 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/DER751526838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f49780221598ce9abb82bc781896123a426d3ee31672873b4bbffeb4fd734. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DER751526849.