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 0x4c9059f7e7970cf1b5fcf8375c234fe49b80e371ea036119be6a3a7ccf619d10. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38e40f79-d717-446f-a526-445fb755fb66.json and https://artists.proofprofile.net/proofs/artist/38e40f79-d717-446f-a526-445fb755fb66.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 0x3ad4e54600026e0100d26fdd9357f7e60a5ae7b90746a6d6771ff27881f180e7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAAA12172101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e531f7c53ac01c4bcb01738a4f3a312eb9da492bc8e626b95b858afed63968. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CAAA12172102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1cdf14c75fd98952e7d9f1bbd08e36d1c53af7d3641925e0d420dee95d976f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:04Z), 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/CAAA12172103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad4e54600026e0100d26fdd9357f7e60a5ae7b90746a6d6771ff27881f180e7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAAA12172101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fbe8c6c20b4ae3b042c64a608293fc643aa0463b5b81e2534d597debc2e87e. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:59:15Z), 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/CAAA12286403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349c03531108c9cd293a8c4cd9278c62adcb7654b513dbb90ad593749975387. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAAA12286405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e35469c5677e22e0b529069b5b4858be1f2d969ed114d486495045672e7b0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CAAA12286401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4b865dc203d39c8129e2387409710744d2f8f3d351e0f72c8052d65058a1e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CAAA12286404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e35469c5677e22e0b529069b5b4858be1f2d969ed114d486495045672e7b0. 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/CAAA12286401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a71acfe977d2be3f357f04e507b8bc9a3fb54eda240cbb520845b2699d30e9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAAA12286402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349c03531108c9cd293a8c4cd9278c62adcb7654b513dbb90ad593749975387. 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/CAAA12286405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd448e833b9ca8240bdcba2ca257bf07d5264c496f324412f1962c95c19c3ac. 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/CAAA12497001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb10e4ee6bac2f2e9c7628995b0202b809b76b2fdeecbe668acaabc29189398f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:41:12Z), 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/CAAA12401501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d54eb57017fec89162d23616577ffa5597c49861ccd34bdae38a6d9f6020e2. 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/CAAA12321303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d54eb57017fec89162d23616577ffa5597c49861ccd34bdae38a6d9f6020e2. 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/CAAA12321303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d54eb57017fec89162d23616577ffa5597c49861ccd34bdae38a6d9f6020e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAAA12321303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24615074417c180f1a6273bc181b898934a294cc8bec625d5f0303a6233aa84. 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/QM4TX2538891.