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 0x4e5f05c1903230193233a600019a532e58b51ba5b045b365e7cec78c27cad9b9. 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/e1668c53-c74b-458f-901d-819a3ae96c03.json and https://artists.proofprofile.net/proofs/artist/e1668c53-c74b-458f-901d-819a3ae96c03.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 0x9c0ac446f70a67178db1723e5e43720be2bac888e938ace15d253a5caa4ccd63. 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/GB8KE2410614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1220dfef179cd04fe7a7266c349cf12f47d8b3224fe0b18bcd2cedbcf325b. 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/GB8KE2311596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1220dfef179cd04fe7a7266c349cf12f47d8b3224fe0b18bcd2cedbcf325b. 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/GB8KE2311596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e903d1cf45e1e60f5c89cfac8a67c4206ea27d12ef3dda0e7115b7ade42f84. 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/GB8KE2311598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecf28ba6ee62d4b9643fc6f3591ab47e20ea0bbf8c201997da1fde36dfc9e97. 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/GB8KE2311599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12422316a5720e79863a4be311b6b97cb0c5bf37f17a42c386ebcb0579d904f. 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/GBCEN2200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3fb3e2cc3baeb32a79ecd86e374f1c0ae35d80e43cb8f0ca0a5093f1e3992a. 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/UKU932261282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc704023f9291f11527e7fd1441c0238c964a23f2f2f3d11cae85590f870dde. 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/GB8KE2205994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dc2eb2d9a48b26f1eaf004fddcbf2882fa5c8d913cf42e37be060fa92a13a2. 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/GB8KE2152506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1ca677830050ec243430c25833444cafa7cc4e5625eb51013278a56d54da65. 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/GB8KE2152507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3b3d4f2d0590cd252e88facbaa9b5365699372bb2f89bafe683e1f804db434. 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/GB8KE2152069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1020818c40cb70146eafa15e6fe1383e03ab14bf5bbc3ce1761854aa7cf54a68. 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/GB8KE2159139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30bd438f11ca573be88ebff1b10ae43cb3023d0c45521f4c76757d18abf9ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB8KE2415522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edbe59ded610d39660e1e5b07e847a9b9a336c43ab1b1dee91cee069f98ef1a. 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/GB8KE2416888.