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 0xa1e00f1790f3887f1906baa61777c2dd412786be033517adba4305640af4de8b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c3d1a8b-4f56-4a40-b838-d5f3636a786b.json and https://artists.proofprofile.net/proofs/artist/5c3d1a8b-4f56-4a40-b838-d5f3636a786b.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 0x026fb4cf710f61d51fdb84619ddbb168c0836e48f599d999056353c516ce5017. 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/DELJ82039743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e22cf050953d86fa6d9c33184697c39bb5d5fdef2ba1dc7971c6d96106ad7b. 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/DELJ82039746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3f17dfd36a4d3ce9d908a5cb4301d341d48374f2a7cc90ff253b844e5013a. 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/DELJ82039748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744c60eedc2ee5077d8770e473de050b353731e79bb81e81c376785134f75f72. 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/DELJ82039749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618afd5bca8e010c85a4af7c508f142a6230c625e1d74ae8776dc2512f50dfa2. 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/DELJ82039750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8a14b5a1313304ad9f2a281ec12ba3177e9fbddea7e0a930928765b577abcc. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DELJ82039744.
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 0x1bbb553487f46c4ee2d23d671aaefed1acfdd2cc9a08b610ded6c32738fa8265. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DELJ82039745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19948d0efe9f5a8598b9ae9362a94cd0ee53a5a81115d0c757911bb9dd18b723. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DELJ82039747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552e5898b0275e55ce2d86e72735f1696b2a12aba3a1f0bb017583d5d98dda8d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DELJ82039751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e5b43d8d3bb4d14aff38634ba7896ebc36ec2e09c6b5ff50daf554010bc627. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DELJ82039752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673483840d2af800f45471b6b673bac85fc4b90bf1f1b177cacac2986c959dc9. 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/DEZC62298979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473797da0739d0f0f5bc66c72cf5f99048ed321d448b838b349c3424b86081b. 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/DEZC62298981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430f6976780586e31b59cc78101b7db01368b206aed8a06922166c196dc95386. 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/DEZC62298982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2e8cab9bdf8144d61eb43700e2ba9987c61f2a284b03b04a233301eaeb8891. 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/DEZC62298983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef238adc1e6eafe163832ce97f32cb4d192861e9159558a9d5019cc488ba01b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEZC62298984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244fc09ed6779eb66868cf68cb693320ed7104d65ea5b135bfe7f6df68bc0395. 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/DEZC62298987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef8a4dfadb6c1606d1fe45c2850c271673ac549a4dcaaa7614a384fd73ae73. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:55:35Z), 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/DEZC62298986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4811c38f4e06eea43ea01f92c7f7f1e368d673efff456350f97fe33fa7c4aeac. 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/DEZC62298980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e5b852313e23336f219e29d482c9e8e7b24260b3ee4dfb95d3b6b168d768f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEZC62298985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347619a96f7c79de1fdf8f8a84bb17cec4b664ddd7e3f2fd69a4c4bc26273e8c. 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/DEZC62298988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e25614336fd104d55ca071949a0144964a2419319fc8d98ac4c50334039d52. 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/DEPW42302512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdead86633d1742b5f2269866d391a51b01c603c0cb28b631c656d51e3d5c7dfd. 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/QZNWT2388972.