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 0x5f6daff02b19cb3453bb798f37e388e8e3f6087f47cb62535e1e2c60761c3eb1. 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/0f180778-d454-4df2-882e-9a046bfe12a4.json and https://artists.proofprofile.net/proofs/artist/0f180778-d454-4df2-882e-9a046bfe12a4.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 0xf9d92e2124cd3850f90e50e6597d06524d1619e26542418e5c300c10c0571e95. 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/PLA552300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4741c1b21e6ca316893cb8455bdc5ab3994960878e89867bdc3c8efbd9451c9f. 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/PLA552300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1085342bf09f670eb671b6bcb17ccdfac1cac35b864af9c7eb7837041d5c46f2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PLA552400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0170c0b67ed27fe0423c5f06966baaa9ea792ce6dd8afbd3273449825a2d17cc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLA552400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c589d8ee31ce01541d4bac2ad1a0d6bba125e458440373c06c07a44ccbb7ea4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLA552400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0391e26bdfd6f0590201632e7d8772c2f03974eb64b08af0f72b6548bb4c67dc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PLA552500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1085342bf09f670eb671b6bcb17ccdfac1cac35b864af9c7eb7837041d5c46f2. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/PLA552400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbddd5518f510cf4003d1b2609cef369c10a8151f983732dbfeb1893eba7db5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/PLA552500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dccfb4842abce63ba7b3768bf8d67b9c5d9b837efb440ed791d4e6833d7996. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLA552500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d611b1e828de3a50ae92a602fb81966c506fb5e7cf08dac43ba22b2181d8e7. 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/PLA552500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafc78c6f4b05dff822b9457c2abc910008d27b7c343787d9c5d90d08a33636c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLA552300534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba971275b3e2dc0494980c33bd9ea59fdeba2d69a43f313f4df4df2242577103. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLA552300395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb767ec0336e58a83e7576b700b4550f91d40108c0e51f312d753a5312db3f9de. 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/PLA552500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034a34a27c9cb55a40e7cb08c9ff76f309178a7a4437b3746892889baacf384. 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/PLV401700225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07baf4c582b91fcc8e958d4936996fcd748bce4e150b27a23541634eb24681e4. 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/PLC062221584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47314ad46f0630ce225723ff728ff3b8824aa4fcfcfaaa5e8404b7deff75ee21. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:14Z), 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/PLV401700234.
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 0x8e6e63c7354e28263536f4bb9662ff950b4265a047847fdb6a13a570b88c4d93. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/PLC062118981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0cbedd9577c1a483e9e0d6c797d252aca6f55160b4ee5372db3389f6fde615. 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/PLV402101129.