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 0xb97edc0f1cc43bea428ffc0ea113fe248a796521b968532c889a2149d6747b70. 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/199b8638-5803-4fc7-97db-36f1d2471491.json and https://artists.proofprofile.net/proofs/artist/199b8638-5803-4fc7-97db-36f1d2471491.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 0x5bc9343eba624d7be9e2a0cca226c982b1e12e6e7700888696e6c6294f7280eb. 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/PLF241704893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7a9597b1a040b455bccd005be00f78589f0377c78998fcdf00e9132509553. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLF241704894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46dfb66e06d91b5711baeb149095a7761266c13817c62ec713007799c541d42. 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/PLF241704895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03f5a306a7482c3ef47e7d3d78fbb5c7ba0bae6235259c5d468011a5a224199. 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/PLF241704896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3000afc56478d71beb73f6c10f1ec2a847b18e5de30046cabefb236920800d59. 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/PLF241704897.
Charakternie (feat. Songo, Pietras, Pantul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb0e98fa9ca3d35548ef58308bcae24972651e2f410b5dfa23769a8dc034330. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLF241704898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74910fc787532a0560f0038e0371fbb2b40ccea353d43901cbbf5c05c44f428f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLF241704899.
Co mnie nie zabije to mnie wzmocni (feat. Egon, Lukasyno, Bosski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6152cc11b4176ca612b41fbd93b4197f88b5bf5271331cfc4e9c360ae569d6b. 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/PLF241704900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56feb8407228ea1b94873174d98ae0d9590ec575fed95c2bebde13ef11d91454. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/PLF241704901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd75d586343bb4a37d1bacce26048c73590bc33b47c300790fcaa95ef6cf0b7. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/PLF241704902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bebb36de8c4366219c65d164a6742cf8a8aa0aa9f762314433d076e082f687. 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/PLF241704903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5750a1d9c3fdf184ea1bc3982023b1cbfcf018c2b042acb62cabc25ce05f003b. 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/PLF241704904.
Rejon (feat. Epis, CoPa, Finu, Morten, Kwiato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe01f029a1fa6a4ea934255bfd2c568fa2201f3dd3a9a935d077425ceef6af3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/PLF241704905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941025d3ee44444e067ae0b5e8fe21d5d0af247208d21d7509cb89e6292e92b1. 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/PLF241704906.
Gdybym milczał (feat. Toony, CoPa, Ania Sypka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e5cf518ad88ae86536e4095faec8d69d1ddf646d8b3c75dfd8e8cbd54ea546. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PLF241704907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eb28c479094fd594c0df2634ed1afccd254eb0daeef55c396c0f6f4ccf010c. 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/PLF241704908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fa15f688020a3c468c6bf88ba5b484c7bc684b8b67ba06a0a4bf5bff2968e. 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/PLF241704909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d13e7199e2eb875eca987e14458ea8b79acd9b3a0a77900ff70d49e348ecf71. 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/PLF241704549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bf83fdeccc56b185606d684bea226c540aad2a4cec247364430b579876832e. 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/PLN891600009.