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 0x85a042563e67bf6391221bcaede64e55b0eb170974bd1c163d54ad518a1109e1. 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/d570813e-797d-4c27-a22c-e925e7bcffc0.json and https://artists.proofprofile.net/proofs/artist/d570813e-797d-4c27-a22c-e925e7bcffc0.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 0xef02483f537f14f4c0042c59a8dd821af9237f04e0f5399d740c4adb8dc2c33f. 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/PLF241300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da37bee1f8247ce198ed47f9a6237efcc728f0dd2140410e71e0ecf72082726. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF671301101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774cc500e0aa5cf8159f618f988e61a0abaf821f7c64479fc75476e39eb3f7e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF241300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324405c621da3a41159bc819e34adc6c8e1c6d570c3aad9d5db78e99b8c9aaa2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLF241401596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3b5d84de293c2bb47386f7bafac8a8121336d6b872f466ac341e8e918b3251. 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/PLC071403005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab7a9fdb61e6ac3ef9a40df5004df4f34f6f15eb1192b2a95c01c66597a727. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLD501700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf864b405115eebfc089e06b47fa53489ef85d014a099e22d219b5c1b5599ea. 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/PLM862400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78488d61aa06ef604549e88a3366f6b1c0e82477be8dd6a8e7b7630cf68cf603. 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/PLM862400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39bff3e5ecd460f3e9c75d7750a329b1e589e0504b7f9a16d5d9137eff836e7. 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/PLM862400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcf8bac0d63cd88a647a5707b451de7db685d2e5a4a86f8d03a7c092308b1f1. 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/PLM862400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835c1a114b0a33d130b536c6b279846cfc3f2189a3d61ff7216a8322fca103c1. 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/PLM862400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d5c504d8cd2f37f3c4516662f02861a61a82966ee3d07565b3478642bdfa04. 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/PLM862400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4e148e36a3de5d4b1979aefa510b3cff4bf6e3af40ec9fe5c4a1d4072068d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF241100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a436e793c7cdcaf2b1eb8091bd3300f5d3d15764aa0cf9c114e8c4bfa8200a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLF241100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569acbfdc4f180027ee1396d545a3e9ddc9988057dd11eae021d42ead28e06a6. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLF241401204.
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
Rozdaję serce (feat. Justyna Kuśmierczyk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76384555cbf037b54c949d54d331eef89668ce33fe68220c1129577066b5f8ce. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/PLF241300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a3566b8bd40fcd0f6e75a1503fffb89df7b9a96c3c45dccfa7d89a72ee5852. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLH871300832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c32d763efc7bf698859019146e8115549e3843e2e271d6497fdd4465533ecb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PLF241100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b92998795b87a2684256af9f3ba998fbac759b354ed82922a3bca71687acd2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLD501300215.