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 0xd84563ba6be40f0fe622bd9a3b9dbb3cb54f6ad555732c65cd7dad9f2d791bd0. 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/815f2420-01f2-4704-a4d6-acde20b9804c.json and https://artists.proofprofile.net/proofs/artist/815f2420-01f2-4704-a4d6-acde20b9804c.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 0x9a667e67ae003bb0ceea00fee9bc4f6fc20efc05a4f306eb6363623b2cb396ed. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/HUMAG2020439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f5a44443ca32014fb61b6c87980c9c0e8c5170d4d0e5eb5dfe6ceae84317d6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUA792000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0060b65a5cc985270da223496aaf34fcdb47a6ffba523267efb83875d0068bc2. 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/HUA792100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88d00d30be9ac7b08986e66009fda9ef57923339eec0098499971840f14166c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/HUA792100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246670c4671c48037adb896fc2ed8acfda6fde4070c8ffe3ca79151f8a7fb49c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/HUA792200127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43b682a026cf73a3711fd2348c96155ec785b1b2aec5e34fa99f4cbfad775b5. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/HUA792300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502885131bcbccee6405a06296d8b784f234b6fe49c08989e8f9a51246bf422f. 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/HUA612304094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92debf14c93efcf105af3aa4980d11939737af95dc8c5561b49029948f67ec9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HUA612401476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592527f994a512f44fa1673cb755283e44353e681abaa3d792e219cb3e5c483. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/HUA612403268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac861a236a587882310d3723819962b8af4d692ccb3809af31d7695ae9af9ee3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HUA612404568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac861a236a587882310d3723819962b8af4d692ccb3809af31d7695ae9af9ee3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUA612404568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef98997ccf6a8740e1ec09471e6fd989fd6d9678e4c2c1303b3b875f9e7a64cc. 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/HUA612404676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8ca6a339df785eb8de5e77c66c966644019e052a3472553157ef33b70b6e6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HUA612501300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7733f931f2c1d33fc71ddcc4aa31a427f2e739874b0947648453c4083c2c99. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUA612502375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6acbb12e2bc98498d9d02dd64434848c8d431cfd9168022736d53cf7f12ec1c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HUA612000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6d93703868e22760cb0ef00c5dbf5986b3438695ae3aada4945d9e60d6d314. 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/HUMAG2020304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba2ca4b6cabf82241ec240d4b13d9ad7b3ed0642d60ade056671493fc39cb96. 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/HUA612400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5894614db127867ccc2bdfb1aa4ec50b84dcb67673796848ba00bc5be9115. 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/HUA612022981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad89a15f6c5d3c6be16e7f01ec0102dfd82983a3ec428756da0fb168f3c192b. 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/HUUM72200079.