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 0x4797975e55f957d08d5548fe6acf07d2e377d813d7f17feefdbb44f61a2d73eb. 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/2c4789e4-7e22-4624-b101-610463a5c12a.json and https://artists.proofprofile.net/proofs/artist/2c4789e4-7e22-4624-b101-610463a5c12a.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 0x3cad496afe933e82c33ea168686c5639b0c21fb0bc9070e315dcbe665afb2857. 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/US25X1801869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9fcf7c7aaadb04ea8071bbf7170f9ba0286393abfcadaff019d41793f1c42c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:38Z), 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/US25X1801870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b275f8e69c27147898b938a39bd9416ce39177ecf2e4908aaf7c5b713e390. 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/US25X1801872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958baea20874126a4dc5be664b7f9348f4a705ba636c0869ab9cd245855d2e88. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US25X1801873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e002ca9669f85d17c6561ca897a6baccafd09ecb48a72e20f7060baebc41860. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/US25X1801875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ed05ac7bf0f7eb24b36fb4c98eb5e4ccadc91c4f065bc67cd59cfacd3d89c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US25X1801878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad899418f1476b7f414c28456acce81771c84935b072167419f9aa0514cf47ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US25X1801879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d5cb5e3856a768dfdebd1b4847d2c667fc2aee7cb3b19b143db443991c859. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US25X1801880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c163eca528a60927ba0fef574603407df32fe7f3f86752f763576e30a4995. 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/QZFZ22073556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2b2789465b99c78dcec11a635821b86a48b647887b9fdabbedb567ce87fe9d. 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/QZK6L2127101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eef2b3956ee806f7ad147a185134b4e8aaa6d490eff5449addd4ce9f9788f4. 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/QZK6L2127103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdca7f35aaeecbdde6143f896901c6e955c504424b5b1c38f723adc11b7ab66c. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6L2127105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e672f540f8404688a904a5804ef0d22d8720f1f78ffb5c95186d17dc846d089. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTBC2477998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02593d2142e3cd1b65e47ba5eebd352c5106b0f7a170477073be8de42f803a4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ7S2470269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883e98adab02e8af7b3b94530a578ea4cbce34b6528907227ece46d346e01fc6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB6ZW2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184a2d28f9b6704b9b8770de573b9968f2a857ccb12adfc5195faaa58861820. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USBWK2300011.