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 0xe8e7aa2b167583ebf022ec9153c46dd664efc119fabedb0e1d912eb3398ae67c. 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/5aa3ddb6-175d-46f4-9a88-9c9001444455.json and https://artists.proofprofile.net/proofs/artist/5aa3ddb6-175d-46f4-9a88-9c9001444455.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 0xc128e3cdb0b7d029d0a573e5e3a9f82811776259313825a15edd1313f94d5a67. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:59Z), 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/TCADY1820186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfbd88563d215ae4a9cb9ca2ae348eac86a2fcac3ca2cdd3f3ec9d9705e38ea. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAEB1969097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae76984b84db700b73a475352370ac4b4958e51b5174025e6f5b3571fdaf399. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEH1904294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca4319d170ef580b745b5a57c015f3fc92b27fdaf1d38c1c3198fcedc2b65d5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAEZ2022423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02815aa16b27042195de1c17dbc311e32e0a7a07ff64054a46a83f2a8360623. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFA2035503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab13dd874dd814d6f49bfe82ac24d4606f5470df97855a28436a1ec1a44af15. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:16:57Z), 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/TCAFD2057235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db5e1f1f08bf88995df0ad24d0c223a40a2c635d9a6dd5da6210ac40384a0c2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFI2195971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e10c4878020f8b396f9f1de7171c0a431abe30c0a0680e5873793c0c4a12e4. 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/TCAFS2122276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe29803f74f7f3dc27b730297f98153308bd757b32df0d020fb7734da7e4330a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFZ2245259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48448eb3e99c34c66ff7a65baf2905bf1e06436787332c43db3544e8f9fd520. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:52Z), 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/TCAGF2209063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245cba75a2d4da671320c8c2351783b95b00541ca5adcf14daacd9227cd57c30. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHQ2357173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88d65a082ff37006702dbf29ef26e80df59fb8f4670f96306ed9871397e809b. 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/TCAHY2426225.