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 0xe03c0f360242edb358aca08b4b994f58398c315c53b0065fa9e105e119f1a006. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3a901f8-5c92-484a-a37c-46fec88cbae0.json and https://artists.proofprofile.net/proofs/artist/b3a901f8-5c92-484a-a37c-46fec88cbae0.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 0xdde207ad0d37725d20995151f1492e884526ad08b0d21fbc9caadf3649715ee2. 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/PLF242211614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230034ddc4b4ce2598a1bef69ce8e2dd9a5f93ab590834fec3c86c33b77dc848. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/PLF242006819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1114aaeba7325d52a8cb3633ee9491c94e35fd42f1c7564b42e873543501941. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/PLF242210086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f4f475447ba6d4aff33fe839579307bd75b03365f458c6ec7cd2c9a278ba5a. 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/PLF242210556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c58e20410c76c3cb13f17f45fee088271bde7da23d0711b6b3bb77a727a399. 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/PLF242211278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fa55b70633c9f8785e67426eb6cd848a4ca58c38dbd78a51b771d0b5b4eb19. 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/PLF242210281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca3cfea7420f0495de0e9bd67f4ed8f2e171559c10cf1d3b757441ae92b160e. 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/PLF242208862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2430612803acc4107c32a236934f3a1672ef6b414d283d8145bda9c358881. 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/PLF242107956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97361b3171b481b605809f1e98601d8cad2cfd4c1cb75bc4ef403fdb15cd26b. 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/PLF242107974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862705b63fccf27227fbf8f562f9e05902ba8c202d1fcb63860f706bf85f4ac4. 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/PLF242107977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a8234f13a229abb0d9f323e3b15fbd8c9a207bff415974bb5bf90aa5c027c7. 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/PLF242107978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78779132e30bd03ccb82a2db60e04105052e29ece653e409e96473f93cc4982c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLF242107979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2430612803acc4107c32a236934f3a1672ef6b414d283d8145bda9c358881. 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/PLF242107956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f5f01b09453b472045646138f995f92b2fb40960727c819099bf6eb45c6d2. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:41Z), 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/PLF242107973.
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 0x31782c56e35f3e05bd22cd325ebbcce2c0ba25b4a5cea8c3e70994a0d0c69f1d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLR901800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b81d022e159264441f4bd62e2d054b3d76a2f8abdeef1dc165c6fe9490845e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLF242107889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016b8b8c150b9c0c131b02cdea5a463e4fc79a0d9c24d296d00e40cbbf87f64f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/PLF242107975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b38c633e84bcc0e4d7444f7639b28d3bab49cb012d045ac67b382573cd99d6d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLF242107976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d57394c2aa4ed556ae609ca662035f45e83600c6abd88dfc33efedd4915c8d. 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/PLF242107980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717815b38285519620e243a5bceea2038a00395f486430ac8ff163b5f00180c3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLF242107981.