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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0c9fda6327ac6f2c8f6b2f9464c2a54bd6ffbd7d82f29db225997824b609ef. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GX3Q92353056.
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 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/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 0x980e5eb62145b4df80a90bb9d066563606951a6112fcdb2331917e3b032389b3. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GX53U2081763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8dbf802de7a008a38c88119304bb0dc718b74c9fe0f1f6aa328a954fe40c2d. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBLFP1907269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bdc2e334586335b30f2e12ecf9c8452b607237191cdc2de5206b0a2dcd0256. 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/GBMA22425455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274f76c4bf57364e688f41b273095bef96f6c204ca974b60ebdb77c41194151. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKXN22344217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8dbf802de7a008a38c88119304bb0dc718b74c9fe0f1f6aa328a954fe40c2d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLFP1907269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980e5eb62145b4df80a90bb9d066563606951a6112fcdb2331917e3b032389b3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GX53U2081763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0724930f3e31de89f2231af612dc03f05ee8ef9b6811abdbe23f77084a6b3. 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/GX53U2000260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa027dde3a353927ff3f600a0b0a85d08119efa48ace2ec1b18d3471000c88eb0. 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/QZMZ92173722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5b44df8640f49246b5ee72d61b30da33203731158db828985779b0348d07d1. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZNJX2087149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8780cb3b394e1e9ea00dc592b793185ce0672ed787a3ddd4a22fee79853fb936. 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/QZNJV2088268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f83332c0fda875e3e3ef01ecfffb04eb53190d15333222b9d9392cf266d8b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/US7VG2039130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc8a9be432efc22c763e682f7050466bdeba75e2d3c063d2ecfae810b6e64f9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHZ41943272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5774bb9c48451c5fb99661e0b51e9b6c25f3f3962e3c0e498988595c038b15. 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/QZGLM1934362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a47dcad2ae9e145e0770ad1e7bff4165e3d541ccd4bcc9d8f1d3d94554cbb9. 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/QZGLM1934364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaee2bce597e4cf7f94751f1daf10f1b3f91f11e8b920a6fc0d9429111d7a580. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZGLM1934365.
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 0x8f833d583ba484f0e03e7bc016a90d7715729eb422abc0d43cc80e115299a07b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBLFP2580341.
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 0x04ade9bc0051302c95ae7d7598eb90b71b8aa1c43d39c6ec37595624c54aa085. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GX53U2412518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1893cb3fb5cb474be37863f209b891b97863c7a8e351d30fbdb573a25e736. 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/GBMA22391663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c1aeab3b62084f311960d93d18972b20444e43d4e1b05ffbbcfb4f6c7b8978. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZTVM2169135.