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 0x512da5710460951dfe1ee97c2f839e286232a20c2b5dadaff7c78930e1cf536e. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eefe11a9-c585-4f71-993f-1db68f6b6853.json and https://artists.proofprofile.net/proofs/artist/eefe11a9-c585-4f71-993f-1db68f6b6853.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 0xa8903dd93b6dfe117c0170bbef89b3505a7af1c225d5d0f3747e2aef03b63092. 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/ES6642000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11bc65498e08846b2b343d78ac9b16bfad2decf694b7925ba38dda3a184c06. 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/ES6642100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45361c934ad50c3abe44e3aef6009e0e60f409a8c6887d25e4a3189a37bebd7. 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/ES6642100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d9f25a1f0cddd66c8e72736e27a0493ee3e2567cd0478e5f1cac94698fde77. 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/ES6642100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ac35010d223c039ba4a54db92f5239a46252cd1067627cfbc8d8b50452d1e4. 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/ES6642100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf865b2203e771ae884ac668420e26ec0f6b70e1ff87a6bf41e6ae7411fdfa937. 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/ES09S1800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d196a4614208820f08bd85d451805592f8c8ec0129996a72de821a07ac5e7d. 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/ES09S1800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c76afd9c5348a2b5bfa3989bfced6a5b2669ba69a6273f56fce3795bbb88ef. 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/ES09S1800338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0ab9ade290b0431f594d9661950664fc305b685fba0e973b152bffc1451f38. 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/ES09S1800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa93c1d708f22ef9ee21b15bc3be6c2b77d262b155d632f9936c25c0577e05. 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/ES09S1800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde4f741fc59e533bfaaef10b546f65406ed05626f82ee5549803ae86723b36c. 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/ES09S1800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3d444dad20cdbbce945270e28ef3a6afa2b581f0d0dad60f319d8424429d0a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES09S1800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d9c2818e0b52aa51bbd43465ef9ccc377563565bdf6bc624e7dbd5a43adea. 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/ES03I1100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b6ffae12ab3cdc35ff1cb5b96b5f43d0f90ef0b2fb1701fd25e3196f8a873. 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/ES03I1100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40954e7802c81691fa9dc3a5f02b1b5f637db54a46cb34db8c88f7857ca45bdb. 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/ES03I1100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d552819a061003a0b8a407f16319bda8a19386c5a855a5c46da968328d7163. 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/ES03I1100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31028334a65ce656b4ba119d7abe50c0cdd22f1420395705e67853e3f486f8fd. 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/ES03I1100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193a9700ac1da0beeb6843d3b6cdb512b4d4825900434bfde88997a7d9a5860d. 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/QM6N21887871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379b3862387a017710063d4be3fa5dd3e615c33fc51749f0df2d790cf8b940db. 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/QM6N21887875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634ac1e0d7dc380b4e6837f25899b8d11d9723c3ee18ad7f8117279fdefe04bf. 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/QM6N21887877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f4ab58f372079473c4bd1034d2d456c7ea71f7ae1f26c8a82d04eb36665acb. 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/GX38U2345252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b11bc65498e08846b2b343d78ac9b16bfad2decf694b7925ba38dda3a184c06. 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/ES6642100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6ccec51444c9998b6d465e00941d3a7bbbb0c5765c492de77748538da47480. 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/ES6642000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8903dd93b6dfe117c0170bbef89b3505a7af1c225d5d0f3747e2aef03b63092. 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/ES6642000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d196a4614208820f08bd85d451805592f8c8ec0129996a72de821a07ac5e7d. 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/ES09S1800337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa93c1d708f22ef9ee21b15bc3be6c2b77d262b155d632f9936c25c0577e05. 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/ES09S1800340.