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 0xd5f9fe108e8e53e40c47c5fcaf37826e3c66a77d4e80c90196b77bce6f86ead6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a7f9eea-da15-4473-b278-6c9b01246d3f.json and https://artists.proofprofile.net/proofs/artist/4a7f9eea-da15-4473-b278-6c9b01246d3f.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 0xda578bffe13618db33b6d638614654b0b9a37473a781205e8ddbf4686f77c5e1. 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/FR6V82051536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5500d789f70b45abf2b9c33b03754ff28fcc0a7b6f29419a56445a64ee214. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:23:44Z), 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/FR6V82051538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b16b0a7628ce6cf27a5743a84e96a3eb93197b6c515fac0d52bd4acb7ba5fd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR6V82051540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bd4387601de5db1c4046ca255edd00eee590860e6248d3c610d3f7b7550613. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V82051544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c4e8d813b4cbe7a3f541a79c8f894d387b732fcf0acf7da6e15d969ef1a8c2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/FR6V82051547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71a5d50eb277d45d87dbf75a9dbe2a12270f9902529def7f8c13ca836ac301c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR6V82051673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d99ac1140eeb9937025b966844550c7ca7acc86b75d1943a6044f3eef1e0fe. 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/FR6V82051674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6cee01a45d3cbe41da4ce53c02e0e38048b3aa5cd01498d9a6371d46d3c78e. 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/FR6V82051675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacae00a64711d09bbc621931d66dac35f69b6372ae3d869db84a6753ba4bea8a. 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/FR6V82051678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479a4175cedb7db569029ac7410f1aa5fb42aebaa5cf885ffbe553f0cd9280ed. 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/FR6V82051680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477869ae8937b442327cbb0976c2a3d8d18e3aa3d3bd2c7e0a803a1ebe91f0cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR6V82051681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5382493f54ef8695d1795d7f30f02008d093dccd28ca587237a691cf498b616. 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/FR6V82051682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccdd7ddd668db5fd819a1ad75d7f911bd1b1a8f74791905105a008b4449ccf8. 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/FR6V82051684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce10f28823420627b0fb58117966d4e322338b7cc4e48df09a1219caa42c192. 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/FR6V82051685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e57e26a1cbd66f596470bc75ae2d1e382779316800dcc7305820ac3e463e06. 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/FR6V82051687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d379d9a196808daf43bc088f95ef471caf44f5b76704785c4be5b8586f92a4. 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/FR6V82051676.
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 0x032ba7ff10a7fce8a5e217aa69620caa5e3de6cebdf6c6562a05bf21fe125c92. 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/FR6V82051677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc305dad2915929d28231d89fd7be8e9c708221b646a6b001c1bb4d3bcd4cbef2. 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/FR6V82051679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d82f9324990b3167c21fc4cdfd59a652b88294c62cca3c6779a2349a606b66. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR6V82051686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302c580046a4a3c1d7b3bed950aca30c5e1792f1115d1ee35d792cf87447cc5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6V82051688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf358bb4959292a169dab0d36df66ab6b40de3321ccd8467ca21ca0fde47a4889. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR8GV1819270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947c13d718a3d1c94e607f191a73d37942eea33688642deaf30b16401e917941. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR6V80921161.