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 0xb8d4af21fef7b3529a4823147ae5e427579e30625055fb80bc9290cc61574006. 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/a0390c21-e804-4d28-be97-6617de3f19f4.json and https://artists.proofprofile.net/proofs/artist/a0390c21-e804-4d28-be97-6617de3f19f4.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 0x7942bb35bd074e31a26a2bf8b6d34445651216fe50d6a80d0bc38dfdf7741964. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:37Z), 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/QZAKB2379526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebbb923e47000c9da988dd282dbcbd943bf93cc737957d31a410abcbfb53cb4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ALA082100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265a091d54b39cd01cb1d451fe38e560e8fc4c9c461e10c655bea9dc6091bcd. 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/ALA082100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec7722d278b04281d86a59c6624733054c772ee53d42df99b185337d4e38dab. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ALA082100334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa064bec0e0d16fea07c3fbf23fc86ccc40571220d662ab5688ea4ffb4d237e72. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:04:22Z), 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/ALA082200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1e7be04cf693ff3d17224f83075958975efb3e9bec7a183f926a4ec6eaf35. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ALA082200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85dbf3c7d8880eb9e241761ed586189d9475c7de11a093281c361d335e7b25. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:31:34Z), 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/QZAKB2376986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743d583be58e27888e72fc1cfa74117169edd2199b71c7a3cea614d59838231. 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/ALA082200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b925bb78087190d0b1343c51a33be00776e2169e9ba284226c6b13cd6297a6f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ALA082200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1082c5e1c305dc36b9e9c049ed18bc0cbcbe83598d238ed6c4479085e20e35c. 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/QMFMG2330782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948e7c77ef562287de8224150c2532b5320ffcb9e1c47f7cee4cdbadedc4d07b. 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/QZAKB2367146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10511b0131beb0f17bd90ea0b25571bce6a700928e32a8016d741506320fe215. 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/QZAKB2379963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3287b4dc0a64b9d8b0c5623c062bf6d540cdf27cd045257210c703bba79ab491. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:17Z), 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/QM6N22408323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738310afd1fa78c8e4d054184c67ec53cc0a6c0969ff555425a4f26a0793b3d7. 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/QM6P42424919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b9c5546f557c6b54432f2e8fc9a326f4460a474622a01b6241f091f1bdd2a8. 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/QZTAZ2466886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d1dd7ae6c49d732030cd9e3346a64e8aa6e74dc3b9c210358c7a8aa73ce048. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:55:35Z), 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/QMDA62455964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98245988b0f6a0551e7bfe39dbfe2fec4530cc9227d18e511c4d32ef791037. 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/QMDA72448851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283322152de5b9b2a566d2950d87f45ea75356907c2bc6155b9a09ae2b501b91. 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/QZAKB2461715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd9dbfb45ff1b6cf7807c13559ac1b97abe71f3ca9d7e89537ee8c134b1c053. 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/ALA082200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad58924c10020bfc6edcd560206096a530bd7b52c04e8382d2b18bf5e672e06. 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/GX4R52274525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232400674df3b68cc35715bac6ac0916ba6000c7de6d3947c25b935ea2ca7c5. 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/QZAKB2369039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daad184d752903b8d182b068de5d1f87b280d80f575012b90e164bc8016eb5d. 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/ALA082200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d2f0f317312a2ffd45be5dd694754f0451f7c62fc88d473fe0204c8db3ecd6. 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/NLHR52186363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47f0601386986f3610cbcb1b6e126821d310f21b1cde26a257146fa1749ec8. 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/QMBZ92372388.