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 0x9c5d8c5d86216221a4d101cb903cc9561b414a3c1ce686ba24209b5e82dfd6aa. 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/ae0c2900-0b7b-475a-b5ae-4a6ee2411101.json and https://artists.proofprofile.net/proofs/artist/ae0c2900-0b7b-475a-b5ae-4a6ee2411101.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 0x19a18e203d950cc227ec7dc04af3e235608b10515928ab15e1c4aa0132f69438. 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/FR59R2456736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0c9860ea6beb7f29dee3cb4c73722afc98ee8e6283366e88e40ffea2639ef. 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/QZFYY2122736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3bee8331c7a2a7f557bf0b9ef2edb1f44bf5c39929f1dd4acf8b5321ba1c53. 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/QZFYY2122737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca494240ec5e68076a14fbccb157abcbb996eefd3957ba4b698a037baf2df91. 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/QZFYY2122738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53c0bfe8bab473a399ae155f9c8a8688e286de1e9604eaf8c5202752df8f075. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYY2122739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741166772bd7068f916cdb661b9033f72506c96014df8791cf2bd5b6e01f0117. 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/QZFYY2122740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f582d459c0245c10c904d0b086bbaff9a1b09add8b683fbd0ada8e030240d9. 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/QZFYY2122741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa361c6cc2dacdd3742ba7048eb4a651c60e2c64e72da5160e251d4b8270f81b3. 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/QZHN92045682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac463c2ed3e9de5e09ac4963d527651d2abebb42a1b57576c8d6edb33eb7da96. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHN92045683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb18e3bbddc836dc16e9f3a4f7294411217533a15c00f2de0f9724a7cb7dc2a. 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/QZHN92045686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f6a3e83ec7ba91547cbeb365e965ad6dc53cbfe870271c2eba9a5dae849fa9. 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/QZHN92045694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe37ff5309224d19bd3890f4b849047f818bcb7511a155a7c399de05ef99979. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN92045695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a37d5098e0dcee17cd8e6721369d4c6b7a0a81bef5f26ca7d801f6fff9e6f. 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/QZHN92045696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83cb52a1d0c042d9f3c77e92350b2e86d74acaecdb4951c8dfc64a3fa11926c. 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/QZHN92045697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798d2aa1dc73f803bf8128b48aab2af60c6b29099d767ba68074954d90d3ca42. 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/QZHN92045698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6768dd76c0d0f1c7c371cdc4f8d94a13160d01cf19c22c9396db7c822809f70. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZHN92045699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f2b24e54288ad96df17a01b5d09c793c7ce646707fd30dca9e95555f357ff8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USHM21695366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021f82e6d20c6552d4abe12636a52d19d9d55966446aa11af1c33055b7ff8ef. 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/USHM21695368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a3c033c0cec26027be173a310c543967e84b9e14a7a89775980f28d3ba9548. 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/USHM21695370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda20bccfd4f299e1fb015dcdddd9fd6f00d80942e1ebfe08f227340224a230. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX762471306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55ec67ab11bb883e767d3a95fcc2f72085816787e45df1992bc5ffec2c0bcd5. 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/FRX202412939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a7ac91e2408e93a90e2300b73409d6aab93e3b89b4b999f784171322671651. 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/QZFYZ2482039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7103c7e04800be09631abfdff224e86d6e27a592cbd5b633356e16ae6dbf94a. 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/QZFYZ2482040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bee247e5bc292f338f545106bfd0b1ef55ceb73c18de67698e4c7905f225684. 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/QZFYZ2482041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bddedeceaf834ba275aeaf41a4aeb3df7e445fe169cb9abac485d64c639f39a. 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/QZFYZ2482042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4ed4f890ddaa5e8d5183deaaddbd1dc3fb5dd72bcd842f74a8aa9c2dd78d72. 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/QZFYZ2482043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095fd93acbd044e247e680800da088ade99ff22ea23d730dbad3eb1e2544aaf4. 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/FR59R2246451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dd58da975b151193a9c000bd0c4cac9e3f9f207e6765b1f6564d88f4ff7a37. 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/FR59R2246453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f0c9ab9a5752c9bd9212449007073446c523ac59eb11482e2c8439c4eaab25. 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/FR59R2246455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb269087d91193baa2d60a469c0ce0116b579a8a73e8353a9729bd04662a014. 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/QMEZE1925660.