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 0x8e4a8a3aa6614d05d3cce2406b04b4e645529edcfdfed7c73a7c57f83bb16f6f. 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/80e5191a-b733-4ed5-88e3-22751530ad1d.json and https://artists.proofprofile.net/proofs/artist/80e5191a-b733-4ed5-88e3-22751530ad1d.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 0xff98b392cc1928212681fb4518358930b1920636e8e2e438aee709a9b4cc9654. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:18Z), 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/QZNJZ2511855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d0c044f768a6aefe2d2069c1ea55c8fa5b58c795185c08250314190daebf7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJZ2511856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d08a2e6f3dd3275420988d5a3f381d17c1e30c7a646081c43b4d026466ef3d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:29:04Z), 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/QZNJZ2511857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366be96f3eca4ced7697634a77e6894c89b2dd2f6c2fd233da4d7286f9c9232. 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/QZNJZ2511858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85bc50e04bae7541784f4acc491e37c9d2cfc40ff79b394b3cc184ddaea195. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:12:03Z), 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/QZNJZ2511860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0a2dc710539f8b4e01f3bb7f6a154e1070007a4317201106593506c6fb4941. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZGLS2229747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6807c3803b4b3211a28d70b20983d902eb1a3145214961282f81ac99bcb34984. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZGLS2229749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ebbe8cf6b2009a2a141edfac900c4855ff8bb49364cc5693e320c1b6c7db7b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZGLS2229752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ba22becce2e5766996d3408feb6f523a00c6441ebc9522b8c98d05d220330c. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/BC15D2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ae4b94add185445fbaac1c7d0ce140bb1cd5a077796a87cc6401a22b686529. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZW9M2247904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218f21897d340d23e9133d291efbfb8d1bc30c1532f603ddcce9a209f599fa78. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9N2252268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8705d1368cc6564fd4e7c6ab38fd1986637d8626cde0bfbb6867e965db52ec. 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/US7VG2381007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4565cd0dd7c840bbcfdc1eae759076e91f08f9c5b105ff9c6cdedbcf0e26c7f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/BC15D2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31009b8fa3cb486efea2c70d392f09192a71ee95e3fc0a6e5e5eaa0e116f3ba. 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/QZNJV2307583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518b7ee8a27253689f2606f9afb37b3b6e82cb1de8b236d4190c606ff2de4830. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BC15D2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a75b559917a5fafe3ccc107630dc936f2800feb7f7d4bd5eecb1e8f6a4c7e9. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:10Z), 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/BC15D2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f96b382640b50815cf3c25c995e57ce70daea5b8e217469a7cabbe8eb48e1cf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9L2367892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001a1a5cf9de597101c36cfb5758173b0a50ae4f05f3c3543fbacd3f936aa30e. 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/BC15D2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4331c2aa83ffeb611d022cb4781c21ee31f166f3f4359271aca4df8194f468. 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/QZTVM2533420.