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 0x67b7fa0e23982e6e8be9a0945c5e75a3c4382e7653c9831c1471805082b97006. 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/7157dbcc-0cf1-4285-bf9e-29603d6d80a5.json and https://artists.proofprofile.net/proofs/artist/7157dbcc-0cf1-4285-bf9e-29603d6d80a5.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 0x4e182765d698246f870e8a9ef6185b83e6a4ee8f229f8e92641351588299cc83. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/BRAUR2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d34b6d3969dbe29207ecfec3309fe577abf5b6583e9bd5f0073e5d59eba025. 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/BRSME7900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2117e62d737ddfc46264c966239e756f3e70d750d220b9fb5179305e4712793. 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/BRSME7900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e7ddf1b58dfc106c0b18529c9d3be4a922617538c769b99253c9b532b276e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRSME7900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7969578ff98e380562a9ff6c36f7ccf6e596436ee99dc56aa20014c16843d13c. 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/BRSME7900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f4a1ecd3f83dea1b588c1a1be89fb17f9c7ca468d6eb56d354aa67e511a4c4. 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/BRSME7900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ab5d0584326ad2fcce50e95c41e1d8382438a8e4de7d1dcb51b98fd62d9f59. 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/BRSME7900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f30091d7cfe04ba914ce3023224c873fcdffb5763067792747a5416c8ae65d. 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/BRSME7900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7574206ad434c0d4273c8f187514c82cfdca29d9e358fc14bedf1cace74d8691. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB0103382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a11af1f630aa67cb40531fba424fd0e0775ba755268c294938017f11e9f5e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB0103378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847debd550276f22d189230433a10ace1805786695582a9e769d2717245d8b1b. 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/BRWMB0103385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe527cbb04f35376cf5fa811b2ab030c9a9f73be1c0398483fd883c4301fda78a. 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/BRWMB0103388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f60f3735e2a372b04397e6b3b3b60000e84a8b75553002959c9c730efcb828. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB0103379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2948e277a6b34d62c80d3169e2a1bf42f9ab992d1b709bc49f6655c4d2dbe074. 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/BRWMB0103384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd54b1b3dff045db5015d2f76bec305772e7697e79a91fc0c790e41e8f7e83f0. 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/BRWMB0103386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c4d69517e3a43b322ff4cac493ffe7b1c405c7b5513b0ce2415d9280ed356f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB0103380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4e792ef533cf4bc8b1d8d7c34a75b85f868539471824bb810de32c4bf5de96. 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/BRWMB0103383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7cc2bdd8b819c4b612611fc0c83c897bc29387b1a1dda6120348f9ca32b12e. 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/BRWMB0103391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195eb4c394209223e623237202c631140ce50fe935dc01c7e5c081a748eee64. 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/BRWMB0103389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1810e73b29f5ff27376ce441242d0aee4308e1552e75131ff69ae4281327c5c7. 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/BRWMB0103390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0456993b60229be273dc5cf8575fcb0156daf71fa3f9e21c593c8fd0b1ccedd. 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/BRWMB0103387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13ec85c0a0f355bd0901f126ea0d2545dbfb46535c106318e50a68ccef71446. 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/BRWMB0103381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e9aa365d96284ede800aa5707007da9899358713928da9fe3250ecda096cb. 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/BRBMG7600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5808508092ff531b9cd849e3502df58ced7055b2477409d2cd2f0d16ced94693. 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/BRSME8000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7becb282b90b07edc64019cb845d8aa4fcd7d80e1a1322aaf78dcec3b77e9a0d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BRBMG7600087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e9aa365d96284ede800aa5707007da9899358713928da9fe3250ecda096cb. 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/BRBMG7600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2628626dcd01f9d25420dffd445f774be499265d4eb49e04491692a84c7e01. 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/BRBMG7400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b41cf8fa3f70cb205b122a85ee3f9a7ca8b3ef3566bf3c747df5f884d1bcfc. 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/BRBMG7400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1dc0dd8a03410a07bbb7a5d7ea2fb84db18b0dd15e226afded752bc96fe27e. 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/BRBMG7400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866ccdcbe9de934cf6b2cee7567c0cb3fcea2a3db082a9b31dd55a115b02a71e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:02:15Z), 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/BRBMG7400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c857f778bb8917e4bdc1a4565b7633dbff0d3501d8998a5c043529fd1e2b6c5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/BRBMG7400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca59b02c359241cbb9f65873ed621fdd500c952b85e20db22500033ee6dd5863. 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/BRECI1200055.