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 0xb30115cd5076d8e8f6ee884a3f8fafefcf7bddaafb32a707642f89fba2fa05ea. 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/fc772ed2-c00c-4c86-823c-45c355cae681.json and https://artists.proofprofile.net/proofs/artist/fc772ed2-c00c-4c86-823c-45c355cae681.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 0xa9c08588e6324f332816dd49ec61a26b34c4bab95b4d4d307a4b4de6a6522420. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA551400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e8c6b9bedd876c2be2b733c43eca12bc706c4be8ab427cdaac5569e9320e38. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/PLA551400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7062129df2c8edf15fe042e1ff06d8ff17050f080fdfc2d379fb8831428f611. 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/PLA551400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f850ce2b2d18a294d7f8da745bb6d11c97d031a511950e1121b4b83e020dccb. 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/PLA551400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecebabdb31b5dee6daaec18dd23c6f12d40e035c3b43d44ef15dd8d545d78cf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLA551400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb74af230ce49827556953d93b01ad2c10bdce1b9d8f353bc637ca43cb40c21f. 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/PLA551400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd577e5cbc0729073e57cfa78d534a61b9ca4e7ec201bb3078df2464108da590a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:52:37Z), 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/PLA551400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd1327af60b8b96a51f20502632a070893048d2d1ca9a85e7bead3b839c2a5b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:32:18Z), 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/PLA581500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947be2adb53ac0523489be4d3a9a1dca37bbd56ae64c2838041ef4d77fb480e1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLA551501517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa83685b1deb413de9e372662a299eec908195779d190305e984b429a561f6a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:37:57Z), 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/PLA551501520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514fd6e2477bdecef374cf8a9afb5679a6a2b1732c79a636bff5cb99a8c3a704. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PLA551600560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f0a3627b65805708283d9e389c30abc24083bbba115e7ba0f448337a42dab5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/PLA551600561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aca7a7982b7b3028598fc6e0c8164909c0338ae98c215de4d731a226c472b80. 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/PLA551600562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a651508cc0d50e1153931c89b33192cd40f1b3f9c387be8c9a40949b34860a. 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/PLA551600563.
Coffee and Cigarettes (feat. Tomek Makowiecki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630044bd364b0c5222cb2d1dc726ebb63f693b70993b0a1659aa551daef2afb. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/PLA551600565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae8be39c00f3df64be2ab11644d2f17e0d80c214bdc16d67267584993c3bc00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLA551501513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9abdcad5595733616a59445da59bd636cf3e6baf97a11ac4198cd312400db. 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/PLA551501515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d18bcc44dcbdb66bfc3493bc4a39dd1f0136cafd3e3860f3662da11c3d9e7f. 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/PLA551501518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d31323c775b2b3365d856c4a9cdc9dac230897797876ecc917af1a1ceb0f19. 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/PLA551501521.
Sama wkracza w pustkę (feat. Tomek Makowiecki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df1a86c4757cf1efacedfbf0e913b2381a0c474a5ec688a74d8fa673b0d814d. 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/PLA551501522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93258930a1291263172aa2668bd77e06f191cd4dc0423f3c4dc174a02af438c. 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/PLA551501523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2674eaad3aa3842c2f9ee232c9b59235564fc893b4e91758ee488be7cc7f2ae8. 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/PLA581600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d7197d2d62db38f1cb329c2677731106be86522e31aba7c11ddf29e4c8d406. 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/PLA551600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb231da20cdb209fb6a0e453f25e40635d23787b81d6844cbc2f1546e7ba9ba2. 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/PLA551800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eaf3648b175eefd130fe4dd9713923d89ed5de626f69549feb32ec690d9ee2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLC591700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b037d784617acd199e7079febaeede9b820928cd94c4ef0766de4669b9e8140. 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/PLA392030404.