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 0x08ec5d3b2bdc131fdcb52b8d31634d2b6337feb1bd38413b8d8d6f84f8253c4e. 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/45cc2906-1990-4785-92ad-5da7489925be.json and https://artists.proofprofile.net/proofs/artist/45cc2906-1990-4785-92ad-5da7489925be.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 0xfa186dcfe129022257fd7891db305d62e0e8e3c8f54bd784ab3f61a4543bc947. 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/QZAMM1855562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dd00e89d51fe08f9f71c2e892731ab6df01c9ef076443c50bb54aaf00ec254. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZAMM2019160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7688ce27db19ead75873b0458cfa14a5d3006229c2787747c9632a1462506d60. 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/INN242101152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c068fd07b5218adb20f62cfe3946583c6dbd071007346b646d29778cf758161. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/INN242105472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fe90c6db271878ad80811980b845d9be90800e8ac0045f10170a1c22200ee. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/INN242107628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cde29a2f40ef889bc4359c3823abc2b287ab7a77fdb898d30696654218a4a8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/IND832212190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bc940ba21546acba9dc76c1f5d03080a384f4a9fbd7908e4c3c52bb28fb427. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IND832213230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67abdb45fb63ea270686492751f4eb4e7e7b6ae3e4f9fcca831f1b5520fdb64. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/INF232201053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5793f0568c8db904df88985505556d1e3a84cc996e2ec97b33dca42b5c1d3fe3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/INN242311640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220c3ee9587688b8c38bfc1ae3253e8601ff15a1d0fd851a01f3db91f0675e53. 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/QMDA72379127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d92fcb1905a58ef3a215dfd3fab410c40638340d4d7981240ccc02793d5d09. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:03Z), 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/INS4L2304775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd74496823b8761a41edc55a2cd956a3892daba28df7016496145bc593f958d0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/INM1Q2332010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3dfad3817a3710327c97dc4f7ceeac510964f23800774434e3344eeed2311c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR59R2431964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff64b4f01c78afc95a83fe6b11daec20cc437017c63abd3889541fed43d810. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0H2459500.