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 0xe4c969f8a4262548c49e61c18f47f6966c2580a6cc48921b30ba92ca5ba74b02. 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/c0693abd-9a9f-4a46-bff9-2409e6f14e06.json and https://artists.proofprofile.net/proofs/artist/c0693abd-9a9f-4a46-bff9-2409e6f14e06.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 0x8fcf4adf55548c67e8bcf001c6da4c27e6d765f3f89f912496ebde64fb688a8d. 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/NLQ8D2101988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e04609226db7fc902e2ed47124fbb1f6d96aa1002c428db49e15bec0e569cc7. 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/BEIW12300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008ef76f626ed5c3506ac7deae9b5eb4708efc6f79c136eb1f348478666ba45. 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/GX8LD2303518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18cf3e5f116f865ea1be6cb40e753168447d748f65bcf866794b78b408c6e97. 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/QM4TX2328063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3a85e872c2f7c3f5fc87fbb49a062c80a39ddcc680df686e82ee528843e897. 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/GX89G2300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005e1e9bf080bc51f5c3b2aa8e9f59fd14d473de4f2fe7eccc0951a430f072c. 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/QZNFJ2204507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b06e84ffaa5d5c6a08e182c10f9d2c05b0ca5369e4c25c5b57fd4c5b5b0b3e. 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/QM6MZ2290017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7a59b7bc36c577b126d41f1fa4e55085d38f5c8b376b8ca4553dfc7c39df2. 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/QM6MZ2214383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c69f6bd39220fad9260feb21f1eb17c058b60e9fadc757620bcc44df1ec188. 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/GX3HH2268685.
Fight The Good Fight (Zero Gravity Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e39aa8b16872a0338f0b999ca16bca617ae95d9e2239bad02f03cead16a1fe2. 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/CAWHO2118418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b95cfdc1f97865770e8ddd956ef20949087c26102efc1618c46640670ef29. 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/QZP7F2173384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed27141c93bb2e809447ec116127c856b7370a188d8957363b054e93afa34cae. 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/QZP7F2158104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f1da62feabde6d1ee4ca7ace8a83d3c533b172bad17fa0bd1e50a6f78ad1fd. 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/QZP7F2145676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb25775260734140fec37c078637512955a1bd78e2e84c0a311b412935b5eb59. 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/GBSMU9825571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c3b8a46ce10be9582326df73eea6b1eba3562e55479a05b545b4b30d2c5b71. 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/GX8LE2583511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3d97df5f86f8efa34d27edb41b52b570030c4b272fa7a5dcb8caf4153f1ed1. 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/GX5MX2406939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfcdd7472c53abde90ea4092607b95a34b5bef27774e574e8f28fa3ff8c8e40. 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/GX5MX2433988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a454c3a7391f3507a9dd606d9d9226f3a52f907ff4ae359154beb98077cc8e. 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/QZNFJ2214472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5065f5f75bb0c32bc265aa678a1dfd21382a67c1259b78e807339dc34b720929. 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/QZNFJ2208936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35720e0cf2322f93bb89aa7701a20709353343758e7336d8e586a78c38652fd8. 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/QZNFJ2203424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d63e2b430598ea060418e10b9f8a907b7dd09864b1d090e7a04c62be31ba56. 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/QZNFJ2202431.