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 0xf8f82d30f30114938eb294373df9aa3f8f72a290a4ec0e12826f5e2410199221. 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/4c8267e6-6102-4e1a-916d-abe9c7e9d483.json and https://artists.proofprofile.net/proofs/artist/4c8267e6-6102-4e1a-916d-abe9c7e9d483.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 0xa3782dfdb1f10d9a61beb075861eebf0e402dcc86823c6ee189cd11e79241e36. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:37Z), 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/TCAIQ2471948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f4638b940d359ab4a18f878572e5be21c7810c7d7f5115201fbdc6fa0a9a4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAIS2456769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24022c4f73f5fcb8c4420c89da2cd2844521b31533b62bc6ae444284cc55f50. 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/TCAIS2456704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb815c4dea5e38d973eb5a9d8fbc8276fab9d15178f07b43980c607dd72b0775. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:57:37Z), 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/TCAIR2456695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fbac7e34515906ba2d4a92f9f47a5d23c5b47c1453f156c54eee806f7f440b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:41:25Z), 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/TCAIR2456616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b491596fba434000e87d3b9842cc3f90ec9512c937d324100ea3e6fb1c28af4. 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/TCAIR2456699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388cc838d0f3a1f6947f4b9839dcb8587cd2b98bd561e17891d2400f7b04bd0. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAIR2456611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8115ba8b89510cf75a5fd65b41eb4a2fb0b11861cd4d7afc6b893e30f9151d2. 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/TCAIS2456608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec9c0d8a0c1904749e102cce379fe9c1c0238e1fbf69c1c5e79d7d5ce64ae2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAIR2476420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c489639d057b15940be740a3008874ff3239622d8382dba3491f2e0648fa71. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAIR2476431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20a43f2962644ef294c8fcebd3b04092a3a1a252aaa49bf73a99f11abf585c7. 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/TCAIS2476414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7072ee04b27997b19e6b69c81526b331783c6c23c1a0cf35b4e23cb6b287f2. 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/TCAIR2476423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ea1247bd0095a777363975b9504a0831c4a327b4905c332cd0c7a4b3b41c86. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:28Z), 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/TCAIT2476416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d568573bb4cca33470cef39fd7f8f5f2b6b7f49a030dcf2af7d07484dbbb563. 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/TCAIS2476437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a66403e6a38a07d5686f1fcf453cb75e0a7d6a00c6a84c1fb07c8feb61d9a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIS2476440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb49949fd1577f7cb2c5e936b9f62543491817f1f491e56c8bd2716e1cbaee7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIS2476606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11372f992f00c90aac15cecf259dddc20ee405878f533d9ce43871550edd8614. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAIR2476421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f89e40ed62ae5f7e7f741a723990c23fb3b1c5ab6285e2c0d865e32269a6218. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIR2476426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd075c70be12f62d83fabba57e000edd72a672206b27ca94c8c14d3902dcf507. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIS2476601.