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 0xc39badf00bef8520bc7100c07721bfeebd6a9e066a9abc86532722dc2a987812. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e95e4ce-d30e-4ed9-bded-2c5a6b6fd64c.json and https://artists.proofprofile.net/proofs/artist/4e95e4ce-d30e-4ed9-bded-2c5a6b6fd64c.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 0x575465b91c17ed7047569ef797aeea8ac0ffe764ac8aaac7dad46c367896cd69. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHM2325044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf45d0e0fed54ec2a22f6964082d11d62a00cc9b1b93fa8e8129eaae9adeadb0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHM2325061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e265ca4a6b371184e9f2190e87acdb0d5062c692fc727934230856ac1b2e47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFH2373365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2223cbd69400c2f51094b682c1ae1d82392f96dbe3e55a5784d6da2938abf27. 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/QZWFQ2326403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007a744dbc75df58ba959ebf74058b3d47f2aa06772e5fdf9e53480242128c92. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZWFQ2345133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81b75d146b466723e221428bfc25e283c9c3190430dea953126e10f12af99a6. 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/QZWFR2329982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf1f1fc64af2aa0a1eb845ade7eef9d0b71b5cbb9b5c4b7c48a622e6cb9926. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFR2329983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe717e2c10623263d37b32f0247e3ef6bc5a9acbab0569b4bdfb41143614344e3. 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/QZWFR2388734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca29fb90c6adc289e08136fc2b5219d9b89dc041d9ebd0ce9f9e0b82dfd6466. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ42464947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d50a83b6d2653c472bf7e2662b302efa35d5ad0a87822a924fb3f714913590. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6P2424419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bbc9c7ab78a8dffc58834d3c959e0582d6c2f453bc879c60ce3a1527e0b228. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6G2445821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073833dac95752e4f5cad72d34f924e591e5b6cabb24884a519663c5609fd166. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:34Z), 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/QZRP42453606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739b6f57bcd691947aa65649092851ce37cf292c5bb40dda1f88135763b2c4ae. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAIM2493727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23369a1895915dfe2788627925a9593c79083b6b9ab813b8b2b62387055b258. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJO2576410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e0b7890dba42b1d3a26d511f8105d4dd2baa5c3a0fce45693fdb54128d1b1e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:40:22Z), 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/TCAJP2576425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c36c5abbe7929ba259604a8bc151b6357915d9bee8c06ddbf683c22a7c5555. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJO2576441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2087aff03fd2baef62a09ec5c9b0851fde3524804c0f854f45c7a937b030af5d. 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/TCAJO2576464.