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 0x93e5878372a5869339f9546ef1c89bb3a5477c45dd955ebd3bb5cc9f0e8a4786. 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/b7eee3ec-038d-42e6-ad28-2a15a2a3de5c.json and https://artists.proofprofile.net/proofs/artist/b7eee3ec-038d-42e6-ad28-2a15a2a3de5c.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 0x3b25505e687544ade4e9e51db1d0e4779abc5a2969cb1e5b7231b5e92a8b9ad5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/PLB820010101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6d55d4ccbce20a096dbdb4931c9e4234b1fdf89ba3a6a726629eb842633d4f. 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/PLB820010102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27361401848cb13e0a6d16d981307b7d91cf6e8ef398f412610d6e2dce71f165. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PLB820010104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd56f2ed61510630e259998cc4a966b802530f31b29d844ba5d69440e770b6cf. 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/PLI360611140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b14092e341b115633d38d85bf4da8098b49c03855de3cdb96f949b8cec057f5. 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/PLB821600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb3fe22af4dce82b79ced052ae0111e3becf7c21b4e11e88bfaabdd88e71a8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/PLB821600139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41453bb126004f67c4f7cdacefd45f33c631c37b7c93ca8ca4f0dcfaf610a77. 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/PLB821600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde254b0ce5a78ba14c444e8adb6d3a9ad959fb358a70117cbc5120067faf0d6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLB821600143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80f91477c287df8e043f6e0e150f76d108566b82df5d8256aca82a00dce642. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/PLB821900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d716cef7f1d053674e7d5636c6aa6bd2c5aa96e6be525f171eab87c5af65c6e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/PLB821900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d716cef7f1d053674e7d5636c6aa6bd2c5aa96e6be525f171eab87c5af65c6e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/PLB821900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb14b004ac696474fc2f75bf649c36c78796115762b31e7aaef5b8625e18735e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLB821900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91ac30ae8588c3f553f8dcb7d066078887b3b52e68539090ac692cae9393f3c. 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/PLB821900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630fbdd37e031156d83f33b86c13c5af69e87974da14e4bf41495e7631e9a75e. 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/PLB821900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41770877e3faa165b2d512983541172312fbbeeab6439e47a90f86db7bb9b541. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/PLB821900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b10aa2d11c06f7f5c50f8fb7ba369be01b3c6c8e9e7d2dba0230884cfcc2a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLB821900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58590092acbed31555d450db0895f93b20e4a513f322c244f37568b297081f9a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PLB821900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f95b41e448bc34a5666b57f5d3c58360c20a6540ae9129d0b9c25fcf0632af. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/PLB821900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8424352e62b068a4b6759290ac88a6b742f7a82e69ee0a7c066de745cf6fc62c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLB822100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37ede962afcdd15092927a10d6770d3301fb2bbd2fca4e499ccec4dc9114d25. 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/PLB822200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d086311c241880391ffcb2b7dc6b3e62df6aa82f774ea44ab9d2e2fb64757a1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLB822200129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2c8d5994673f84ca535903db1ec09ebee8237cbf107227707246b6fee4532. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PLB822200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef355061392ef19b6ef2c3b3eaf43f271996f1cc5c1e57e483a87adf9a8bb16a. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/PLB822200135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038d70ecd88a63ff94bfed473686977ed692c724a63b22c38083c96699857bb0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLB822200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56495aa4169187bfc4eeb272cf1061ade49f40d91513bf0e769ebef80f343997. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/PLB822200131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e080094e38e3ef26dec947284719782d473c51fa0dd84f9e8e889b00e106c4f. 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/PLB822300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e080094e38e3ef26dec947284719782d473c51fa0dd84f9e8e889b00e106c4f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLB822300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455789682c0e344ffe3500e772c2b7425d8188d71eafbdb809b4706314943190. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/PLB822300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b1351805bac67fdaece4a6ef3d619cb622da921e4dffd125fb71e414f2e43c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PLB822300130.
Moje Kochanie feat. Sebastian Karpiel-Bułecka
Moje Kochanie (feat. Sebastian Karpiel-Bułecka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7ac5021742595f362e9dd9d0f085f54f190a0662a25c90c965077f0076fdeb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLB822300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd4188fc18725803bdba6aff7cc5d242e4c8cf150c2cbadda451be8f3022bd. 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/PLB822300241.