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 0x5ecce46e3986bd0a11f109f1462fb8a047dce753adc0013806ee5653b630aee1. 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/beb7e3a6-0ef2-42d1-9572-743fa0c5b97d.json and https://artists.proofprofile.net/proofs/artist/beb7e3a6-0ef2-42d1-9572-743fa0c5b97d.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 0x4f9ca2ed8e08a0d2e85724eebd216ea706ed5bcdc3a35edbd4650feb996cc18f. 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/NL8RL2461562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03220345e4566980c48161578a85a3bfa834c6f5bf51b526a745fbc5eb9652c4. 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/NL8RL2461565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f4c4cb891691370edc91a60066c4104670174153158b8337a0da3270ecc24c. 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/NL8RL2461566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec805ebbaaafa3850dbf08920b8a611444a84ce4cddb189fa1bcd975340cb24. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NL8RL2461564.
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 0xd1199980d4fb2104d51e3a58d116ce081130064758c385b81f7e6f28156c652d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NL8RL2461563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057b7c4771cf13341732c3f3b5fa19545552361731e5d95077987e84d1523eb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2461571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01367ff51690eb1e53811dc3534bf59237448ec1577b932b7f4cf1cfba10bbf5. 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/NL8RL2461572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe244ecd9a65dbdb534f70440a9fd2e2b3f39c35243374c77a66d7753ae4c6ad. 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/NL8RL2461573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881c1c8699b1d8bde55a9b7d80a08c7c608b953e10f6fb90c07c96e2283d1591. 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/NL8RL2461574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb7c61d0fab93f95a9324de3fdc45c3412b814935879f7337f5f06caeac8761. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NL8RL2461570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d47b00656862854355782542df43cc578fe927dbb7462031650e9dcfcefbd3. 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/NL8RL2461576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f9687307099089dae45ae1b691ad8d8db2e5d9c2801d3a07609f467bdf1a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL8RL2461578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac138df2c04c1c06a6f80ec120090a68230afddaf5e7d055c71cae8ec54b3f0a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL8RL2461579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85f760c9801538d949c9cc46ea252e5a29791a9e63015156f283149061a6a02. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NL8RL2461577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f3c97bfee45bec6f10d54e7b81f76b716fb78adbe21b19c596f6bae491594f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/NL8RL2461580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785431bdc9b20810843a33faef96c2a8527091c37790adab7b58bd0c2381e3bb. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/NL8RL2461584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9e7a31a3f1979c749041d358db4b4a17a36a4946b3000728419b186f85b56f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NL8RL2461585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99d99e629051d48f5ae9691f20b3225804d1d608feb717f7bdbaab3e72ae06f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/NL8RL2461587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270abd070798321494dbfe890379b2be05b1e85610b5a40e8d19d935f0dbef9a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NL8RL2461588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf228135197aa3beaae6458d40a1aa89a6393534e6113037113b1efa463be73. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL8RL2527030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f2d8a5e62b74aded0c2686806dc7cfd076f454a6f603b0cdbfeda424cea76f. 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/NL8RL2527031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92871906b389945c3144da9faf5e48369ad7f35d9b505612cfc0a86987a6e1d9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NL8RL2527033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427254d94aa74a6c55eac14f9bb6e323c389aa1181cc5c74543db6de637445f2. 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/NL8RL2527034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3a8004657ab26e6d2fee05ba7024a980e216eb7d8a42f09acc9a768cb19abe. 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/NL8RL2558158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891c958d94949897fa24002cf9ef98ea3af6b84f90d56f81d1fa84fdd0e83757. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:14:09Z), 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/NL8RL2558903.