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 0xf41672df480d66f23badb7f4a6f59709ce888404a69fba2d16fff0b32821d06e. 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/d6b2fa2c-84a0-442e-a478-3be5b27fe1f3.json and https://artists.proofprofile.net/proofs/artist/d6b2fa2c-84a0-442e-a478-3be5b27fe1f3.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 0x3b1fd21f24f266ba641a2739019d4caae1d0b5109a07b3a0ab19a47a7691184f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEF160609858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0fb8c81f275f5fee8fc814f0e1d66bdb342ea955d41461589eebc7a8756609. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEF160609860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc916dd00b5bfc3869da53d37d1e5b9871138cb3cb53e9fc8c9f0f811e75232. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEFZ70700150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8889365527ab782ee58329dc3a6c4503c7e869cb1dc71eaac0c2abb31730b04e. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/DEFZ70700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a6e6b26f01a5cfdece7c9febf688ac1216029b2b1d7739344e81d6950275c8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:02:53Z), 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/DEFZ70700162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ae9f500f7c78be552161a92155030220c96dc66d1ce77cbe6c158f16b278d. 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/DEFZ70700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0564646fcb897029cbca10b7a862fe0d61b23048eb3db821e43d0cbfe4f87e. 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/DEMN91200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c97c07a56e914cd862896ff410d3202eb0062232e215350fa36e81e10f85d6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEMN91200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a379dc9b14a2eebdcabc2c373258201ac29266c99768a1c0056ef8efaa7a114. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEMN91200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebafbdeb26fd868a320e4ca7be6b48ad6125d8646086835ca0c1680462bbd001. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEMN91200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a51c18347e245c03906c7d61431c0795e0ae3f4792643763a4f23bb89b0bba. 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/DEMN91000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf72f95412ac31bef8b026b3cb4296d854191ac5a65257c403fe4f98ceb3f1bb. 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/DEFZ70900127.
Vendetta (Ersguterjunge Sampler, Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c3407c814fe8a99ed4ed7b3a1201e71ba6825690b1c8ea9055748616d1c5dd. 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/CH7812190904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ccfd93d3ec887c34a8162ce50c3e3099dac9e70e776ada8f6fd63b13d609b9. 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/CH7812190915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6447b4751973fa9d8b516b77818f98fbbb18c089dca5341f290a21ea68620ff. 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/CH7812190919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbb67a9a866651b31db4b2ffd51adde9c7ad3c47c97f62d8011646d53d1d9bb. 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/CH7812190922.
Nemesis - Ersguterjunge-Sampler, Vol.1 (Re-Release)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e14278e288b92d93c1d3fe477eb4eed5bb9df0c8abc95fb22c21d6678c69c3. 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/CH7812103260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe392f484c26071135a14f1c7ffca4400ba559189c06d3848d84eff854f40e183. 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/CH7812103263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3696ff3977e9ffabaacbb18e996ac811539e8b08f969394110ec0ee576ad030e. 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/CH7812103267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e2bad56cd120ed4b33e0a2bc8a6ca2abe058fba4a12d3922eb66beddcc033. 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/CH7812103271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a22900aa3e8c4015b53cf3774f1ab03a9c16e3d24bb865386ab1f9dca3f8ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812103275.
Alles Gute kommt von unten (Ersguterjunge Sampler, Vol. 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55008f71287446b8a4a158567c8c4ab2ada44e08f36750890dbc026769f7bff2. 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/CH7812100839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a7a2cd213460bafded05f586b3cdc52301451a91aa2a62baa1517f7fe9c434. 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/CH7812100842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7d6ac10bedfa3801f699be40d5891f41e199d5b4a677b11f135fb9b39c4c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812100853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b568a8a785605df6b402d488ac128ba2104d19f87ebb3c47c3377510c2d60d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEMN91000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd507c179b8e3ec3cad0ff4043615bd988a6f82af2f58f21f2b118a8d871a9657. 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/DEF160609834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9586641f508e68be9a506dc417eda306b14d685f25fd46eed69768be3038f4f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH7812100851.
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 0x2461e208d0f2b3fe2fa7c1410b64ce65eb0d5c0912bf51fabfe9e5225bc9dc80. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812198295.