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 0xe7cd772625b2f87c98a3983307d9a0c5bd31bce09ae50cc55608724bb46c7762. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601e24af-2f9e-4f70-a68f-09490aba8eca.json and https://artists.proofprofile.net/proofs/artist/601e24af-2f9e-4f70-a68f-09490aba8eca.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 0x84f7556ccad1faf671720314a51ef476ad3a0d9363087ad45a0fc83bde996cb4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/PL44J2514739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c851d2d50ac20057fc6903a67d22865bdaa4523448ee16e6bb9e916d822943e. 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/PL44J2524774.
Zaprawdę, wierzcie mi (I) - z filmu „Herkules”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7deda1ef89e5a37eba7031b13b21b559f38940ff3ac4b48febc42b78ed5733. 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/USWD10526108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8e04db3f5c77a734bb674b877b9d105d25ff315b9178b6d928443ec27dc7e5. 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/PLB171800545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383b67b645b3fabdb6c4727f591f79b312b1fdac90d5f8da828e493f077b9435. 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/PLB171800546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b91a320f268c7e3ae27db2c0350a09c6237242d700bba7956e96ed2b95749. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLB171800547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc588c054f2312c05d95463357679a788b1468f1a241381c5a61c4df7e68cb19. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLB171800548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7957d97e4ffc9b5145c3912f354fb20747cc64f7de42206f780c5cb384a1ecab. 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/PLB171800549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680dc415fdc77584c475c9054c522d04a095aaeb836402f280dc44e2cf8961e8. 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/PLB171800550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8b720841077b51e7bf861baac8fd8ce24d5f7b482a0a50389bd9ecdf3bc7f5. 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/PLB171800551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b27d71fd8530b6539911ebc5807263f51dd0d481d10d157b03154bdab600f71. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/PLB171800552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63552f2a2442b8c6cdbf26f7fa8e6a6f0958635fdae52929811ae39c4da19ab4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/PLB171800553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a30804b44be5efb32acd751b14eb9502c1d8300cb545403798b7b6be0a538. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLB171800554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26f86f32accdd9b0e506808cd7c08fb9e18da6d4ca3ed993da76cbd16de1dac. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PLB171800555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9763aa36e7fd174505b3704c3822cac66fc7f33f702bcd42714686adeea5b8. 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/PLB171800556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dc698f9618f3450c360a1f8738a84e21ddf81deb5ef8f780e2cc626a850836. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLB171800557.