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 0x27d725ebd4500583523068d678f4f71669b2a88ff5c567b23ed34d6aea85cd32. 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/639a3f68-948f-4ec2-bdd3-f6e6e34570ee.json and https://artists.proofprofile.net/proofs/artist/639a3f68-948f-4ec2-bdd3-f6e6e34570ee.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 0xc199ae582aeca110badc98866e8db6b68aec8e43c7f58e8f5747422a22b35df7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/PLT612130004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4c4d388a92195cc68db9eef9b2e3c8168a1b7b742c670c5ef85d3ff100b9da. 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/PLT612230001.
Paluch - Drugi Brzeg (DJ Taek/Dust Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e663750618e63a172da505a5fe4766316e1a466394232e650943c158d2ea808. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLT612330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a060449c29a9a5801f462ff530b575f09085beaed4dd2ae028fc6bbca6a2dd6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PL2DY2302074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fffb4b9a32488cb2cf9fab5a7f0b292742f29ab95331d8346a364503b53709. 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/PLS712300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71faa31049f127a200f7db6c553bc4f894ba95f215f13eb535e995fe08ba6c. 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/PLS712300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89413f325ccec95c8188964c3b45b8c1166fa9d92fb2aa02b97ed86f133c0bad. 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/PLT612250012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbaa85378a082027a18edc5c7d18faabd427aadd30021297e1bc9a7d22a69d9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLT612250009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d7131f81c26e3b2da9e5a7699d90505b64d0d75fbf97b8c5edc1b8e67e718. 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/PLF242107636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad71faa31049f127a200f7db6c553bc4f894ba95f215f13eb535e995fe08ba6c. 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/PLS712300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f96cef2ae0aefc18cebb9f720f61cfdd607fef8b0c233b8e917cfa4fbd5d7d4. 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/PLS712300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b3c3608b280a9abbb8208918bda59503c52be73fb71ad88de9ef3eec8c2206. 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/PLS712200005.
Kto sieje wiatr (prod. Ceha) - Kto sieje wiatr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634d76c82f7fe1d87d94cbabc03f40d2ac9a80e11921a37fa6c6c89547954d9. 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/PLH511200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f61dcaaa46d575d0d1156d99182d066419bf7e969c67252d4ef47344a5b4032. 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/PLH511200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbaa85378a082027a18edc5c7d18faabd427aadd30021297e1bc9a7d22a69d9. 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/PLT612250009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89413f325ccec95c8188964c3b45b8c1166fa9d92fb2aa02b97ed86f133c0bad. 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/PLT612250012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b31c1c8899968c06f1f45681a093e88a488db18969f89d7a3a6a85928a3ac. 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/PLI368375980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22644df58f7523de8aa4ed1d373207e0c590b79a53e42435d22c96b9591d87a1. 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/PLT612040002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0809299423c017a165a87aee09cb25ae48511cb0a5f278021edad618d321d0c7. 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/PLF242411842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3056453fb8b32a0863690c759bd375d26ac4302bab6e5c6c742ddfb672a4f0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PLH651700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb6e2c725137fc1d7415dba7a71bcb65e167932da4a94d982b900eac9d405b. 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/PLH651700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f7da5e4e926c9e2c4c7166e1e19d414f7329d690b07ddfb730fa1adb19be2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/PLF242107643.
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 0xa2ab43db2aed47d47351a4e7746972c14b44ba2bfd86d57217432a0ae3937604. 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/PLT611700004.