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 0x567e3cd99ee29ebe2f7cf04bc9975d398bd6caae1defc52d8f0185f9340ab492. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a904ddee-ac4f-450e-8398-e19bca11d5cf.json and https://artists.proofprofile.net/proofs/artist/a904ddee-ac4f-450e-8398-e19bca11d5cf.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 0x75f2c6b3c9aa4584439c0e2abb8c359022f2a0fed8b34beb9f127ffc90628143. 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/QZB4J1898334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74339f6b8026bcf65d5badee383cc777244cf05db8a7e49d08cb917e585aac. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:41:29Z), 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/QZDA41804428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e54df05de06268a52de675a232a80efa8cd2a7fc46e5a403d1fe4314d56eda. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZDA41804413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca10059e8268497761760854013651550a061879c35519387cdbb0966b827a3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:53Z), 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/QZDA61800245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905752bf5eff7f32c2fd6d2c71f6468fe61f26dfaf0f5aa00c1020336852dc8d. 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/QZDA61894215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078c1321e9a1d37c3ed8c5f1346d79ebe93f82f7b03a37f8750b794751877017. 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/QM2PV1803935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc85398cbfab49895498dc1eca9d4251ce6c1b4b2aa77952ed64be19e07c241. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/UST8K1812212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aafdc963d1548aea5c0b3c9280fba49832cd86d4b78c927d74a1677705b0862. 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/QZES71873519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fee08ccfeadc7af2b7bae85cbac54e56e30e66df8a61ea9c1f6186aa8acc69. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:10:56Z), 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/QZFP51805762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ae7cea168ca1b4e4064b77679d88a97eff79e7b6a870b68f0eb27450ecd3b9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA81936956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314cfaa717982b63165771c38688f0f42422ecff34f10f126ffd15ab2bd4c0c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA61981816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdaca2f9b4d317d5ef2ae44bca282e99e57e06224880a441228c23b5360f7c5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYY1954335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113890b5d205aa145e4ec26685b4d9af7778502f781e3b953baaab35a84ac1ff. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZES62203789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe788043635da9367a4463a4b751b7f63745b71aefb94c83578d6ad18cf82e37f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZFZ62106900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159446553eeb9fc4392fb9b69ea9981a348aa1c2569f86d80a28961d7083a8e6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLX632200023.