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 0x70014e33723e5484c9c4db72c0861e38786909fda687f54c485c4185fcb476c3. 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/171595cf-655c-45f5-b824-23b3cf52ba74.json and https://artists.proofprofile.net/proofs/artist/171595cf-655c-45f5-b824-23b3cf52ba74.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 0x4d41640351023706231e5822da415bb2a47dad6f4358aef9ec9e63fa54755c74. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QMPKX1846303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdddda7d4f899731fd1b8596c378fedb8f440c0c02bc90749f1533e2ff56943. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMPKX1851040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d596c5c0f73ce5354c7cd1f3319d3bf37809b70183e2fef28a72108fff2fd73. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZ8LD1961373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43fcaa698281cc845022cfc3e554afb1e3beae1af99fa0e522a85970d0e1db5. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZHN41922601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541c789422553753d7ae5c6a5009c5a92c831d6cfc9aa21fe3f1d1fde2bcf270. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZHN42161228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8874b74814985f4f60a5da0ab0ee85a15100b5d4e4848727cd05f8c968434e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FRX872112574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016998982f113f83f399a0da1f977da3a9950a9565426259f7b31ac2b851a83. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:07Z), 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/FRX872102664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991db3d5deeadb5d2a06a7f0ad55186d2f626718814683d8fca074143f95a947. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:08Z), 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/FRX872112575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d054991af3f1187a737cf86ae436eb64f33dbf2cc9a562274c7a0fe3cbced71. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX872112576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a24ad7c2600c0b6889c3961d99490e49a817cf34dbb14391ea228671fd7e7ba. 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/FRX872272123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad81263a9e978e4667146c3ab1f5c974a2a7d2a8f266ab4ce76ee788beacbc5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR2X42415045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be68d4b27326ab7cc2c018d0cdc9d2e1d515616d858bd8bd1e51f8529e49da9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:23:35Z), 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/FR2X42415046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6555c56e1c625c92cd3cb6877333b599e2cb83e37c6b7197063daaa51f5c0e5c. 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/FR2X42415048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ab79467f427440048852b2891709b379128f2714f2a5d5af96afda3e515d5c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX282455915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a58f7130d7ea1b28c898677a3f88c4a068713c1c195a4ea19050d5b668decb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA1M2404006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b15687e33fe589c091754ecb57a3d400758d5f615fff941580b0bce18b27a0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:45:00Z), 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/VNA1M2404007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b996efa8e448b8efa76adaf50cda4146fe0d1eb4790f4d784c2dc27274bde1e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:41Z), 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/VNA1M2404008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ba82f7f77f1cce6c22f6cac68efacac098c1fd5f2758b1fbeb90a14216283. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA052589805.