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 0x9b23934f8868aac80eec5946466369d20c4682d3b6e2caa66988bcff4329aff9. 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/fc77486a-e4de-4e9c-b92a-d7c1ee2e269b.json and https://artists.proofprofile.net/proofs/artist/fc77486a-e4de-4e9c-b92a-d7c1ee2e269b.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 0xc107f6db2c290b0f9633fb7cdde6e3104a230a42e96fca6bc663562e29873d20. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:05Z), 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/ISA220900585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a3dc8d3083c907098f9e48adb6ffd39919a5aeca831e646c9458c85b844b8d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ISA220900586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd11ea3ec79cd5769e378fc1a78036d7bfa36d556156d80d9bfecee225193f36. 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/ISA220900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ede3820956905ecc94ac034d3fe7d623b0b9d56484cccae2fa2262f1d5575c. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ISA220900588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d3b8c3298e3894ae9bc1e5143d64f4dd283d1535e7fd19840f765cdd346b73. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/ISA220900589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0aec309088087809ae9d82b66eda905c19d3d68a8fb833a4a65dc6e3d9109bc. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/ISA220900592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d0ea7e8e9401135a4f976fbdb23af1786abf6d38e0cf6f1074e7588e7c152. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ISA220900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee7f55c50e2dff216749286ce34fb924714b605a614370947bdacef56ccf6d4. 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/ISA110804404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb508e7599e4e91fdb4e754eda113b9311906637d0a57b5bf95b7db4c026bfee8. 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/ISA110804407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b9a30b1345e713dc362e2c96cedfab4e1f871e363c23f22f3897bcdefb173. 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/ISA110804408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd950ecc744e141ba7590a12d8f559dbc4ed828fa48e12339e2a30475249b85f. 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/ISA111003205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb539bc779ccc27564886ed6deb740d092a404aff52e01a7cb80902497242d0. 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/ISA111003206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacf30045beaace3872e946b1571f2556833d795f4122e5ac12b876c17f2db77. 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/ISA111003210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4868270f28090567f98824f160235aeb44befd2e6622d9eed680ee9a9e0651d6. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/ISA111003302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6006e88d0c7d45f1cdef69d1f0fb7d8ec71cd08237975a99f35409cdf31f64. 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/ISA111003303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a76aa632aa6bc52f74381de135a488d79645b59822470e5cbc2a73854ef5038. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA111003304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142aa39d4fd8d8cdda7b70e57e052bdc705d3cd2ad0309f2adff9c505bf9777e. 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/ISA111003306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d93acd6fa7c3b9c5b9e4b2229b82e1b77c3dd709c2abbe7425d06900051fd79. 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/ISA111003307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626ded696b034f28f1b26bef1d74e8955d87fea8e240881ef12ae22a92bf36c5. 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/ISA111003308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe794405bd9c125c602b401e42d0314217d5be038827f3ce3956340adde140d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA111003309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eb98402c97da4341125c362b9fef463fcc0c59f3f36b9ad636cb5c54f47b76. 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/ISA111003320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa589bfb52464b3c9fb16d8dd5a9ade2bfe3814b66a48c0fadf302883d45bfb66. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA111003407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc00e012423884eda11c85598f1257ab2de3e9545a04695fc5d948116250ef95. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ISA111003408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496cda563dec99a852caadc65aa56d4b6f2008bafb8570268214cef9b4ddbbf9. 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/ISA111003409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0106a4b7bb4f4d63781a186f4f28a89b1c9db8af5de3451b1af823ee87905b2. 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/ISA111003504.