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 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 0x008d2c265ef3a83528fd8f15c5e60c616275d204c9f006f57197ce7fdc2f5848. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2927b1e0-f292-44c5-bfda-3026240258d5.json and https://artists.proofprofile.net/proofs/artist/2927b1e0-f292-44c5-bfda-3026240258d5.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 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 0x02e5210fe04a354f5263ecb0d0fd3c8ea08c0c208913092f8f91215508c9d36d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USCGJ1284509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffa2d45eee8a42f1f954f063979d4d2aafa0f63a4ad107ff853139e04767cee. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USCGJ1284510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fa008115709e97088e0b77ab155f6b7ebfb39501d6dbdbe6a07fc73cb1a32. 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/USCGJ1284511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae8ba3e1948541831dda9e5d30ea73cb97bbafc86f7c340f20ef7880ff96afd. 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/USCGJ1284512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac129863bae7d42764489b2d40e5567b5047092c3b4f6a216a4b431496cd78. 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/USCGJ1284513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc95fa4f3e3f8274e21d3af4a3e564f3986cab2751a2f0c639984ebb62902a. 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/USCGJ1284514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff4c9726bbbe795a2b63e75988e64100da90bd748a56f2057b41bd8d5b2203a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ1284515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567f4e963b77a57963b1f46f4a5b3476dfeb906ca3ee39342cd27a81d0248a1a. 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/USCGJ1284517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde00e102651b2ab9bdf72e0ef1b40f984d7faec2e7affea2da1257cfad47ebbd. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCGJ1284518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241d028f546519ac249091622b3ea5cd0483fdc819b3fa699450515cc8c63b60. 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/TCAHF2323244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b6dd231158ff5c4be3bfaa4568c3c24006c45f7386054671bb35af72417177. 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/TCAFQ2123822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85647972ca25306a38b8e09b1c41b745a00a790253982e2ede8ccbaa60aee5d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAEW2075273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3c0e0efb94ae2647b922a271b880193788dea551863585cab33c45014aab84. 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/TCAEL1983397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a624cf5124c922d68e7be0a3165aa2898a2b605766fc470646926b5acb672b. 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/CAVN71500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b783f9b5344fde63a4477cb71a6c284fc6977cf50cd1ef43882c4c9a8b85e8b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAVN71500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd369658660b56e104cbf1babc568169c2ddd42d52ee9ebb598b4c575d05df5. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/CAVN71500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b369053ef47de46a198fcbe02b7692e32df0a86df5085d839d241bfb953ad34. 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/CAVN71500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa3816efae53706628533c90e32c628ccde4a7b73fe1431dec3a57301a3f338. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/CAVN71500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bbabf9c9ff3436aefa857f28dcc174835a2985183376b0c3701a1a00e3d8dd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCACN1648021.