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 0x516ca9367c586035d3815eed292cefef4cb3eb745f578caff9acb440a4858e28. 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/d14ffbbe-273c-46b0-8f87-5417b1b8d22f.json and https://artists.proofprofile.net/proofs/artist/d14ffbbe-273c-46b0-8f87-5417b1b8d22f.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 0x6ee267baf6912c1959adb25fee8ce73e2054b024d81889af91924b637ca3193a. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/MXUM72008548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569478895ad30d5fec15ebf7ffa340f8d6f4abf192dd2ca89bbb5f0fbb5ff11a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/MXUM72200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deea120acb7452b0a6b495195cd4b2f9a86f4ebcc9c8f463c6336c65ee7ca32. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MXUM71902712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4443c95997d71401e3c08dfeb714f518f2a6691ad782ea7977902c94e1344186. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXUM72103318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7a933ecd641124cf243fd685852bfd430a448aa74b681984befbf3ae3cf554. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/MXUM72200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388358bdaea47c2b05b69a569be6975264ddeba9afbd9ba88b2847d812db07fb. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/MXUM72200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d9adb1f6fa54be07c64da0e4930b3c0a1ea4ab99e8a6b9b590a1512b64b50c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/MXUM72200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b14801495e410cd7a31b91886289d9bc5ed46f8bc3f64e172bb73e541bef2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/MXUM72200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9737c8573e550e3e3acf3d7ac900794a944ce52b03c85ce81c4f3bf852a333e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/MXUM72200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e1bcb3c5ad26d0015500b23b645f654b7d6fb749cba67609a7f2e1bdede1d5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/MXUM72201701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f18579a1194c71e3a87e79d554b9a5e577c41805e4d0d0d490b356f6a0f2f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/MXUM72201702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0ad9c81bdc63aca556d2511487af3befe4823780c480465101c15b1a0daa18. 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/MXUM72201703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6ceeda57e2aeb3711141691a8ebe8b661b87de0195350b609a2656805d59e9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/MXUM72201704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd54e0546efa5aa131bf0e4e1224a6de0fbe394772fbbee81b72f35f23542ab3. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/MXUM72201705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc746da141737c3818fc71ab4ec6b5a2cbdb8644f0070d0682fd8efa032438f5e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/MXUM72201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9ed18ddc67e2dccc4420d7be968a96d825f5e5dc304fc4c2f2697c99ff4b7. 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/MXUM72201707.
It's Beginning To Look A Lot Like Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff1a8f3efd6ea72cf27bbb0e7a79ae05567af2f0e1eff76869978ff7c3370a6. 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/MXUM72201708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308575b818d6b4003ad8351371e41dc28afb5eac01a569fb814fb078b2558ef8. 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/MXUM72201709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7b8f40f1bc6bc46cd0e124169e131ae728fc687e1344900a36d2dbc4b5e5c. 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/MXUM72201710.