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 0x156620d18c811a4e4a07dd5b503decdd9ff1c3830f8cdb40a46bb3f7f5eb61ae. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d063991d-65eb-4d8c-9408-526b733c7cb3.json and https://artists.proofprofile.net/proofs/artist/d063991d-65eb-4d8c-9408-526b733c7cb3.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 0x5dc381f999b3b02a9d4d95b1bdf5d7eb4222a7c16ae0f94f20e4d68e1e990b70. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ATT252108040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd130d1e8fc3fb92d9786eb1769c936da3cae51b52973ab05c06de1871ea2f7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATT252108070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b9bbff4cdd8118609e37f72aed5ef18f0f8ea5436d84e9c51787998353af7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ATT252108090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53006ea5dc9de56a4cb7d054f3d4c689bfcf0020537c708c6011ece256cae1c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/ATT252108110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00dff48fe3ce7639771f8c495e6334130b55d3b9b65f81c27a2ce672ef8336c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATT252108130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb700d223a828800a45266c65d3947457910c620074e92e6fd43d7e474112030d. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ATT252108150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a00a6225f8a9b0d6ec2c8be7100e5f6ec104457402d7ea6a18bee1ce036a489. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATT252502480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28de3f89f102a642b9b1422e0fe34b440299ab35e60505fc5da21c0cdf2874. 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/ATT252502490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2a5dc15b2b0cce437420b5e8b401593945df8def188ce1c233230aa40260ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATT252502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b01f4aa78886c5aacafe4b041a28b76aedefbca22c2587041acb24609039a49. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATT252502510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca24b4fb7a2762632f497bc34e3119293dfcec1d86296b46e164c87f12e7f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATT252502520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60842dace73cf7cc5b219bc84b907764e32dabe0fb2918dc8c4539527aa1209. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ATT252502530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceddc504ba9d529c92798d67ba1dbe2d0631fa2981790a090c35e3083edafb5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATT252502540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f12847d7395c30c73dc6424f83ff400fdbb3b5f59986e91d6ad44d47a8ca8e4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATT252502550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0108579fdf4b51d99083ef67fc142bc2516d5d9e5a03b299d22eb52e3b9b5d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ATT252502560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a7b063266025f4dba361652a7f9924d1ba1a7e88c990e56cc463ce58fba2ff. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ATT252502570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade35798bb088d8643ea3b21740e5dcf5916298ddb86127ec8639bc7b7089e5b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATT252502580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c61eceed831e48098e7247307b27343e1f348d48b652a2a57b1828ccc1ba7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/ATT252502590.