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 0x8cb7acaf63b19d559e59956aeb45585313cb1c79217a2bab04265a771d38eb41. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b807cc9-872d-43f1-b660-65a42d4c9fd1.json and https://artists.proofprofile.net/proofs/artist/3b807cc9-872d-43f1-b660-65a42d4c9fd1.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 0x6c439cca6235bb720a1e664a98a096e762857e5f6f4ac4c6217a71494f6dc906. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DELJ81464435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229f1d20638e63de409154ead0cfae005656d731cf90d5a8002499fc81a34888. 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/DELJ81464436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1df020355cd6ee1a2797805d65ca894d7412d498d8ede57878110f2d549216. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DELJ81464437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02109e588fd07337f40acadacf17ca1ca4702105eb3ba6e6d9cacba0d69d7d64. 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/DELJ81464438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3988afc1e03e2f72e3f815315a754a9fc7717e9ea0ca5664251148c1c76d39df. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:08:49Z), 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/DELJ81464439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f80b05e3f80c2cb0c441adc04939a98e9cecdea6c80d672b948ed4c0022a6fd. 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/DELJ81464440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31657d79d3fd2d573d3191ad2fb6fbe422996d83cfce74b1cd8772fd04df63f6. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DELJ81464441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202f6cd574162f56c9438c4efae8a7575377b4ffc804cbdfc5c5a581dfcc4978. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:42Z), 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/DELJ81464442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db0f85438338e5677b031b7192d8c65d32e802379fcfb7feb6c21aad840db33. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:15Z), 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/DELJ81464443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3719bcd24a5ed4a3c0811ebea20d197658d27268ad972061c448f8913f19253. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DELJ81464446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721b9f6de5fd328a2d0fec38f6f3f0dbc10feac6f31de364fb130a00c9023bdf. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:37Z), 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/DELJ81464447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a2f9b03b8001d432e945c7881f7144b70ce0f009abb402b00dcf8aea32391f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:01:10Z), 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/DELJ81464448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeee0a8a18f266259a97b1227fc9a4b1463aa008d26d7863af5df62e85cb15c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZC62368120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e51407a45b82f8ebd8b6eb12b1451fd6c3be46395f83e66d813f37e3c9d5f0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEZC62368122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5332975eaa2635e4f7a7d4e1e61cf55e1fe2fe9e26fcb0853dd8df97e9757f1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEZC62368126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aebd6baa19d8d354d75d160194c89e86c75f58a68d63651ffd3599acfdd188. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62368128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254ec8bee5744a869ec00c6f89727a38bb4ec3b1b5554d1327effdfc5e65f6a4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZC62368133.