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 0x63d40f15b0f44658ca3c17512cf1c40a15fbb20e3f474d3e1ef11b42c4a4e34e. 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/de3e46eb-790a-4fd7-8a73-6a0e6a83a6ec.json and https://artists.proofprofile.net/proofs/artist/de3e46eb-790a-4fd7-8a73-6a0e6a83a6ec.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 0x0ff4614f860856967d7a8736247820dd4268cbe0417487cfb81da3ae23e3867d. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZHNA2495808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63092cce1b949caf7da8d1e5b0e857dbc3cc7ba388215140bf489e0f6e6cf29b. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNA2495809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e97e4fc43371bca221bff18f65bace874c12b94da4a231c9972df4cce186d1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNA2495810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149a2b0c4f25a426d0bcc92e79835642ecf4dec79d4b11c9d571768e72a26a7d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNA2495811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b1f3422f7518913e3637ff69131e750fd661ae65bed6d5b5fe96b696d4586. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZHNA2495812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a54a8bd7de0695e35a283bd8fdcd5bc8623d7abcafabf5486cafb11a234283. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:18:08Z), 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/QZHNA2495814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee51429c7f35ef87cc6d160ae5afa40ff7aa51edceabf33dbe699efcfee8be0. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES72404702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1545fd5ee6124a1551592a537360e99dad5194e3439360da2c91d1dd368c4446. 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/QZES72404703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc58c3ea7b3796222c4e3b9bb05d859460073786bcde2733c646cf9009ce713. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:32:56Z), 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/QZES72404704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282d5af24f68da947a91fc9ace500ae3f5ea03f156a2d1673e2dcdc55f20eeda. 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/QZES72404705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160a53e4528f1908327f3069d0d37c8002b660ee6e14f171930ddbf1e673ff5b. 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/QZES72404706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cd8948b6bc86d8fd30519b9a426fc79674ba3642d4daa7a6241fda2506b755. 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/QZES72404707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c1313720b21d5712eec1da3e9f59e28fb5bf7db4e939d477b06873bdca2be2. 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/QZES72404708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01816d26bd6880ba679023475d8dd2beba851a55431c7dee8a680029fca6767e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES72404710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fafbdba0920a046ebece01ab3ae1fa9c865e2330c1fc4fa0f8b57ae1e9096e7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:20Z), 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/QZES72404711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ea40181a7e6fdc9eac1d22ddc7deac1c4d8960944455dc9b660accef2f5f58. 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/QZES72404712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca263419ddd8c40215716c83353000b3bb2ab68a513d1eb98d425fd972f7d8. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F82520904.