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 0x7098a2118aa67fd77637908cf2cb5a885aec5a880ec9b492f94ffac31eb1b4b4. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b0d54b7-1cec-4bd8-afd4-b914a595f4f0.json and https://artists.proofprofile.net/proofs/artist/1b0d54b7-1cec-4bd8-afd4-b914a595f4f0.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 0x42954df1132cf2c50cb112d28354712320cbde7bc366292284ea0803505a291b. 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/QZDA72497925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b2401c285f636433492b30a0c3c68fc3cd71dbdb5b43962baa36118a4ef955. 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/QZDA72497926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff45c37620100323ba1b762b9cb4e3fa9611148bfc4d5263eea1a62d142bbdc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72497927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc1b40a19f03624bfd5845b436a3e8148ad943e7ee2f26ac8f74f4accea814c. 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/QZDA72497929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750dc3422ba739f6a549725d39f15ba3022cfbc6355511e6236bf6ee81eac1f2. 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/QZDA52408746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deca2a12a3dc8ea2a97be982080509c12ed60f84ce71db29b8179022fbe42af. 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/QZDA72497931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4338febf695182be6edeca944bf942ae01f989356b18264a83902116f835b8c. 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/QZDA72497933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4bc766230a3e7b8eebbceec43722d4fb9c1e8bb81a4933e7a00fa6e96f8dda. 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/QZDA72497934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df96e8f03e72c08f89377adc6bd0db75770008bff9a9ab4942963b1d804fcb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:47:08Z), 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/QZDA72497935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1256d7475a0fda5e955fef977d7eac2e9510ff9e3063b75ef627673946fddd5. 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/QZHNA2240725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26f950dd91919a502bcae1552e7035c0aa82e98997e09ca04b3c231c4fe591. 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/QZHNA2240728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121148f95337472dd5b75e39d0cb7b5dcb6d17723f7f2cf6753156c1ae6e2412. 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/QZHNA2240730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510de0d460ddeee97e5192cfec0e16abee656373c94a6f7eb39fa0e8caf71d9. 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/QZHNA2240731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750dc3422ba739f6a549725d39f15ba3022cfbc6355511e6236bf6ee81eac1f2. 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/QZDA52408746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6b9ee1c2b61678678bd0a1392804f87bf4e2e8faed56ff1108a5dc2e37e47e. 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/QZTBB2228169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c08203e8b87fb677a74f81ea706a30ce459a32a453a2c96901f7b34146e1e1. 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/QZTBB2228171.