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 0x747d1e19fd87d10770a0c7f7607c34b3dcfc81bcf1187ac8e42d1c8a0b3dd885. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c3ad025-cd9a-4f0f-b84e-0056d0034ac7.json and https://artists.proofprofile.net/proofs/artist/4c3ad025-cd9a-4f0f-b84e-0056d0034ac7.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 0x50ff40514d719eaa9ced52f0fa0911c1db1868d3ac3ad5fb4f67d1371ac674a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWDE2259728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd9abbba1648177bfd338f92c76b48a62ced37442bb19c790904c66e05cbe6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWDE2259733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7f8105cdb4f894e798f9eb513188e98fc5524701698a7f33d898bd3114ceff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2107712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8841c419780b3c0b4735c2b7d844457674641af32333579ff03cb82dba4052. 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/GBKQU1987092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10df77bedb2c71faa9552688166e02ac67095643d58ce729fedada40299f29f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1953563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dac0ba555d773da317c78ce0e64c951c174ef10ecbf415ed4198076a058931. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1953578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1875bac4936e47cca87aba38f799342b9bd2dc9633f65873f4b5f72865a017b9. 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/CA5KR1953568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb0e595f9f4aaf73f3f43a5eb3db403e0077fdebffedf8de09c7543046e205f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2123448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597421f0458ef644c422ef275cd6d5bd79320eea86ad0a89f0daafc095ed6e98. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742040896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba6f7c92bcefca66a6938b777f22d8d1dfdfed087fba12fb7eb896b9a0e5b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742040900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd60c9d930a7fb56554b93e7eb8ccf63c1fcd9f59dae2f1d0bd8715cf14cc4f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742040914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d56ccf9ae3fa634d57e5ae63fc0a0e72cc1d4598608da652191e8ce70d9c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742040916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9016aa87e8696734a5b791b2b5b3eadf730b759164f98fe48081e14bc2b503e2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEH742406195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235789f338bdd9172089e118c823cf55e82db6bf2363165d7c46805bfcec72d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742406197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169fc18c394a5da1944a5901ef9615b7acf292991fee0e5233587c9899981e1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR1937427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3398e4456ad5404f2a0c4d44b33eea3d123d762cd1e7575dd202de95a54d757. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2046687.