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 0xf010e64c3dba2fbb4d75f00c44628e821e39542d9e3ed5fbfa48c13bf2bd5695. 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/a04e2056-8ac6-4f4a-8d00-80cc3f2f80c1.json and https://artists.proofprofile.net/proofs/artist/a04e2056-8ac6-4f4a-8d00-80cc3f2f80c1.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 0xc218b054a24721a29a38c4dc2688566ea5ada89cd9dabbe30a8d10f5a3e595e7. 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/PLF242413323.
Dziecko We Mnie (feat. Hades, DJ Eprom & KęKę)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a1f3c71a5a8b34564db6b53a2faed7f3cce58fbbc68221d3af149da5df32ab. 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/PLC071407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d299dfc291ebb2974a0938f69e303f589353e9d041f5cff30016d7cec7dd66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX281532071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb63ec5270fd1435f155b8a45377f15678536cc87aba66e09dd7e42f47e5e39. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLUM72100677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8db6d200cdad7979e13402c3f79311cd4c797c46b2fe341361877b80b23b9. 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/PLUM72100679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589dfca028e21ad72162d3c93fd703e2cbaac473dbe26ae209fe4ee83a6af6aa. 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/PLUM72100681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2292e4f26734de95aee2ad241719cca583825bfd27db47be14e561a65972fd80. 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/PLUM72100683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0bff05a7bd07abdda4c3d16dd1691d4be5656a3308e6a2878de563a7753a10. 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/PLUM72100684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0620b9a2e65767d00af797806377d8c42d2213e8a96861f0c87043f96a3c6835. 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/PLT211700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce013eaa012b3cdc34ef93e94c7adf86cf17635f6b200d5ddd72776e706aead4. 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/PLT211700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d667d9162ff48b30ad887265336037999c66a2e422dc36b6fdbf8929e51fb4. 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/PLT211700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb6bac99a400f32e55706a1c8d3d9929baf6049f51a6459c98c2e52b6dda08. 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/PLT211700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b523883ccf3df07a1f72059e143f096a30ab8039ffc5bf64cf01ce8a7bbfd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLT211700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c4b017fe512b78b5b9d29ec04c3c3ec71aface1a801049d301aed31b50af66. 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/PLT211700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870c8a50c6469fc1479fe093a6d39561414c626b4278f9aae25c009589b7f3e6. 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/PLT211700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e2d6bec1ca4b45aa1e8a750aa09acdb7d1131cda12a1970a0815adbb6c3d3. 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/PLC062010715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d035b3e4d46d603593e5203808c8f2d8c722786b6faea912a0a1f98e54f0bcc. 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/PLUM72000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc218b054a24721a29a38c4dc2688566ea5ada89cd9dabbe30a8d10f5a3e595e7. 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/PLF242413323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf969ee1c406601ffa345fd89e7ea14f4318dcb5635cee3611f246af4b209464c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/PLC061807369.
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