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 0x514c8b2f82d05288eb7168cbc3f68eab036d1434bfca9d44b5fb33befc87016e. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8aaac14d-ef02-4454-9804-84b5b3941d0f.json and https://artists.proofprofile.net/proofs/artist/8aaac14d-ef02-4454-9804-84b5b3941d0f.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 0xa027dde3a353927ff3f600a0b0a85d08119efa48ace2ec1b18d3471000c88eb0. 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/QZMZ92173722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907549a4c09b318be44176a8dc7fcc6e2b1111fd963510e581844ca969f610b2. 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/QZGLS1908063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780cb3b394e1e9ea00dc592b793185ce0672ed787a3ddd4a22fee79853fb936. 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/QZNJV2088268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5774bb9c48451c5fb99661e0b51e9b6c25f3f3962e3c0e498988595c038b15. 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/QZGLM1934362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0724930f3e31de89f2231af612dc03f05ee8ef9b6811abdbe23f77084a6b3. 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/GX53U2000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdc2e334586335b30f2e12ecf9c8452b607237191cdc2de5206b0a2dcd0256. 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/GBMA22425455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0724930f3e31de89f2231af612dc03f05ee8ef9b6811abdbe23f77084a6b3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX53U2000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027dde3a353927ff3f600a0b0a85d08119efa48ace2ec1b18d3471000c88eb0. 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/QZMZ92173722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780cb3b394e1e9ea00dc592b793185ce0672ed787a3ddd4a22fee79853fb936. 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/QZNJV2088268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780cb3b394e1e9ea00dc592b793185ce0672ed787a3ddd4a22fee79853fb936. 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/QZNJV2088268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5774bb9c48451c5fb99661e0b51e9b6c25f3f3962e3c0e498988595c038b15. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLM1934362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a47dcad2ae9e145e0770ad1e7bff4165e3d541ccd4bcc9d8f1d3d94554cbb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLM1934364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907549a4c09b318be44176a8dc7fcc6e2b1111fd963510e581844ca969f610b2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLS1908063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fef3d22bb55ede3d7e98477c93335910f4fddc4357226710aa96155ce48170. 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/USHM91880669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42816cb13d925354ce0ed673f02ea90476008980ae337eb0641876b072033d. 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/GXF9Q2450163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1893cb3fb5cb474be37863f209b891b97863c7a8e351d30fbdb573a25e736. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBMA22391663.