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 0xe3811405b6734b9a09f8077dd4a1999b878307eb22845533125aa7aa83a66088. 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/92cc1cd0-8f16-4f2d-a6d1-161140e0eec9.json and https://artists.proofprofile.net/proofs/artist/92cc1cd0-8f16-4f2d-a6d1-161140e0eec9.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 0x8ab477deef8174f9db4f892b9c1c4daec6543fab3dcb0e6b20ae34a3a9afd349. 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/QZDA71892779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7028074192f6f3f813750497d265bcbcd57ba7cb4486bb9caa1f31fc6a70fc0. 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/QZES91877469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf536f128939ce36c5fb0522b308befa8e3a0d1c53f66ed2731a05b280f4ee. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:56Z), 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/QZES91877470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853368f533aa3214cf1f3928e9fe2fcb7f84796f56c02d01edc7d8945c5fc2e4. 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/QZES91877471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccb210c2359f38f311639d9d00c4a6ac712938a2afe860d7bfc1da5f10d6b14. 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/QZDA81811650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34da8822d2113e013e68eaed4a54330137aa946d549d05087c958bb003b75d4. 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/QZES91877472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4246ce0f653619d23532f06e13eb3318431100dbdc59685627a4e8cbf82d6d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA51963981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6447b6bda1d2488c7a08ceb1662da2757b4d94d1295deb7a9568b30311f6c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA51963982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420033ea40d0c41c5efb6be9981ead5b3fa3b51b3d1969de34979975f4d1e8b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA51963983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67df1df87d71c1d18b61b5803d6780bb44fed1731ecf7543932da752094b72eb. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA51963984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cc88ea7b5eb35bb9a52ee98c963464975a37be60ef48d2f624e912c8def2c0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:37Z), 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/QZDA81931158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffccea5242e14bd8d5d19192369e823328cb1253b0ed05665eb93986d2b13d3. 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/QZES61975688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e4bdb7a83f2676610024b716f5e6a6806676f02c88b15c804e2995421110a0. 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/QZHN61984319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a69e7e0d2a9862bb54cdea3b1e9479d62492fc4f96ef761e370825b459a6db. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZK6G2024020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27ef81203c3c71a6c7b03d6d1ca507b192618d8e3e1f311c874a70470d3eeea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU6545800.