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 0x3c5508429ccdcd59c9619eef2bdec7aed48b167e272e6fc812b43ff825908321. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba201dc1-38a3-49d0-9a3d-72fd1a2e8472.json and https://artists.proofprofile.net/proofs/artist/ba201dc1-38a3-49d0-9a3d-72fd1a2e8472.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 0x217241573fe06c54dd8ab8221a66c41b717ef52cba9b1244c50a5cac9c67cbb5. 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/TR2081501694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d66c49901c30312af9d14ca8f447ddd30c94953cf0d6a50864bd4febef7003a. 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/TR2081501695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97887bcf2bbe417473043b033408e1dc35d2ea434ff55fc612200f59856aeba. 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/TR2081501696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699ee78d84620358f833480225db26bb87326c81666a206594c4304c6f139659. 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/TR2081501697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e12aa25c52aadd4f2ae31fe9c36848139a3226b42ff43725f03ddac905767d. 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/TR2081501700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d899c1f434454a934d127945b98141dd1952c2883f62ab37f996bbd266aa65e. 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/TR2081501701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f4776393d616c4984730a94c5461fdd1a6fa37441ab928da6bbe112cbe04b3. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TR2081501698.
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 0x3d0fe5f39edf31748f10d4592bf103d3441fda69fbe5bd1df75c2c0a79b6af0d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR2081501699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc07c65241bd6ab65fd89738a7ae44d7b7d4a4fe55c25325c8e257cbe9fc7bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR2081500669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dd3cde3b88ff223be4a543365c161f57436657720beeb12697b080fdd573a1. 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/TR2081500670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe972c7549d4e501832dd3987aa9fd5c9967586b89559403356160653feff87b9. 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/TR2081500671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dab3cb050a89a1e869d3b6aabf5f12704e3bb3293f99b9b1306cfc911879f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR2081500674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724dd080ef6b88bb037e9da3b7472ba56b61abee8185405abdc153bc0063c0f8. 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/TR2081500675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e41bf3ef45df6c0208dbb2737f3d120b5669db7e27403e34f727feeb665482. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR2081500676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff9500439cc2f50abd1b3bc70922b4665c296e770abb2e74fd4f020c2d0d76. 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/TR2081500677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c59db8003ce7354d0ff6ca2bdac78826fde9744da233415f487f45ccd8ede8. 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/TR2081500678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edbba1bd55cfcd354450fccc81c33ef9114fd6710a6b8290f0679328d4bd097. 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/TR2081500679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edb81dcb7e038f1e7a9b89e935f8eda0aeb4920b8c41e599e5d2b93953926e8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/TR2081500672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eaf7dd74633b80be7993c1c3327a554b7636cd3f4a908ec1480285776c85e9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TR2081500673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3daf8c1eec116191d68cdf62caa93f5266a507623203eb6b398358f6631e6e. 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/TR2081501684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b0c7c6e258f17018f0e92862467ded8e463575f7200daeb7b6bda0cd415f7. 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/TR2081501685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3db5c7abca43ac8db0d0e8833719999edced2cf87a72cd6fe452a0944f71e7. 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/TR2081501686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bacc5ae9e78f95b90ac6524e3fd152167460f0a2db5b3b088af9b5cbdd66e4. 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/TR2081501688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5707616de714f74fa4c663cd39be57844ef7b3e8fa9da2bfa33e49d17f8621. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TR2081501690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbf32111a8798bdba2bc708d0fe37692b72c5348952bb1d10874d527aeeb845. 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/TR2081501691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11941bd71b89271d619e7b41b304b436fae477e5b35a21863c8b1b34d163714f. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/TR2081501683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6b0bcb6eb82aa0b3d35535afffb8fe514747a25d5a64921f4677ca5d546b31. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR2081501687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f355e08ff708318329ac14a02f1d7496932a30c993ce2e79deb415a8b10480d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/TR2081501689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209e3fdeac8280bc2c691b33e1a19a2098e1c34cdc39191b2b77b8620711344f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TR2081501693.