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 0x998334993f6e67b33b891353d52dd445f92bf67ea10b0a9a8f5d75475dc62d5d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fd97fc9-fc8f-4184-84b6-c3b216bad40f.json and https://artists.proofprofile.net/proofs/artist/4fd97fc9-fc8f-4184-84b6-c3b216bad40f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Advanced Entertainment System (Deluxe Edition)
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 0xe1558d27be5487c6f6907436ccdfee1af488b42344526a2ca195067ab2947459. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb08511d100e3b4ae3c8dfe647152a54b253900a79b39c5767cdbdf601b9c42. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e7c8a2fa92dcac7cb03ec73da4c532fd8a27b1479c1ca3dd941f9fe63adb5. 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/FRZ052100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae5b293e69c91962687d5a14f4dbf9dc335ec98b6a69000a6402578f9031a27. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59b570fef3f48b26d76e745ae52319e0ff0f71ed769f194af84ff995b08efb9. 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/FRZ052100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f85c53c715a4e9a44088acde11aa3ee5886b0b6190b2a90dac8e83a7b5be3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052200546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf5f563b173305add7ebe140582c813360c0f20fd9227ae769ffed8290129b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf995098f51b96916277cb35f80e749ad2bad0d96da29736ebbb61d6d770dfa. 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/FR0NT2200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb8a9d635b563a9a9012ca389fc1abe23ce7b4e2487d025d5f3fbe29e6b086. 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/FR0NT2101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e5a265101d4807d723a6d3c9c82e74fbfc6951aed3135ad4aa38eaf14cd2f4. 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/FR0NT2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c03344f054c49666e0c0a13777c26825e8e1e8355e23bbb8cb84e95a4a701. 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/FR0NT2003040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e7bc3de7cb087dad495785951538af852304d62d40f2c2a1116b9b5edc987. 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/FR9W11518518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67509afc1ddef1593e5c23e2f40a949949b3b1fc90394a6c9700267c4548423. 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/FR8Q11500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa427b90c666d695f0430ea207c69fa06941634e91ddd7f2130c484ade28fec0. 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/ES7002258001.