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 0xe75b413bdd98c46535346650d6e9e67e97bffc48d337b2501f8933c9d7692b18. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/749c8895-ba71-4ccb-8794-e726c588f642.json and https://artists.proofprofile.net/proofs/artist/749c8895-ba71-4ccb-8794-e726c588f642.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 0x661942ee7f016b90bc137fdee13eab0f10574307f9ac374d7ee73d88211f2fd2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:28:24Z), 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/TCAHQ2320040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaad87e848e4b7b08e4308582b7c370e28aa7f2d3fe24e5f57ec6c87381ca343. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:58Z), 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/TCAHO2302596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51828f6446a701f0962fdc4592dd95340ff45cd8369fb19a09bd37846e04a380. 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/TCAHS2300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb17c635f09946f1cc2c7827a1609f41f6bb70b43fb8f12b2c9c89e054263ebb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:47Z), 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/TCAHT2439380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bf989127986b40db54b87cbed4615b4512eda353653cb1b1fb07dd42bc59a0. 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/TCAHW2426620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf15b53b2ea7d7acba6d0846b66f652ae3cc3f67177fc370b2cb7ae948413e4. 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/TCAHZ2472086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ad077a90cc7e8b4e01799ad2f65f0a99b435424516abccc30bf5496c8240a. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAHZ2472110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9fd8701c194482068199def76d85a677055e651469e1e6e5aca73b298ae9a3. 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/TCAHZ2472141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d845bd04e07aa7ee59d624c8d20cf7c2af7a29ca9709c26f1cbbacafab263. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHZ2472155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff3664e7f548aee8c13ecc3e05f928a8b61fbaea3e7b661b1633f7e615b2263. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAHZ2472180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b17f922d04634c17552db637320cd172226f2e0ccd588f135404b2222dd7c13. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHZ2472195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc174913a2f4cfa14327eb152cf1889610039fde481c3ace6cc7e4cefac4894de. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:44:28Z), 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/TCAHZ2472224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3556c59e1c7e587a65861d8ce5bdbdc091e2d5d2a7167d3db703e1228ab19d1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJC2480724.