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 0xe1524ab9b1ab2fd8e2996f351140e22d866066d311ec63b27bf08d97e17a95c4. 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/94c2b7ad-5951-4ada-86e9-b1575617222a.json and https://artists.proofprofile.net/proofs/artist/94c2b7ad-5951-4ada-86e9-b1575617222a.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 0xea615907c117d6341a46cbff177caf787c073f10407e00889aaa6a35e5f30c6a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN42103843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f27e6624e000d56a30ba91162d284366642f9574dd83fa402c01144be4ea7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:42Z), 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/QZHN72114680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35dc5f74603a969af49c2def8dbb513cf1c7890df10643ba01d5773d4d96501. 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/PLF242211078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf24ffee023e4537dae11f9e3d5fc4911d36e2d7667f6d5d22b805c02c60da0b. 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/PLE951500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f02325d256783c1235ad9c282b3bf48e1eb5551532722dd3925dfbc8537c1. 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/PLF242209793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309691bd117b66e8c023beab96051a8eba0ca4d17374c5d14d39f58914054a4d. 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/PLF242209495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd37ee6cd468559a2181129192a53c2997fe9111d0ccba170568b1ea04af9924. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF242209829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e4565963a0771c302cf0c94ace25d1243222a674250ddef28867236a92f9d8. 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/PLF242209496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921eab285f38049d68b48a6573b1f7e1dc30218fc842f27c1e72dde683a064e8. 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/PLF242209830.
Ile dla mnie znaczy (feat. Lulek, Gremlin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267f4153168d7f9a28ec583f0671a5442cdb490cef9317509ceeb7b56549d71. 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/PLF242209831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8cb8760915ad34efb1eae745e5a84a516988a01c7371623fb958e55ec69660. 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/PLF242209832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18776b65030884f87c3661be43b6aeb47e30e46ab6ee4a68cbdd952b458050c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLF242209833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74845778f7e9b91301d8e75efc7b20801e2303f112baa721bbb7992b03e2bf92. 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/PLF242209834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee73313e5c12c8caf50400c55ff44d29ba03f5bbf3a32380eb71330efb57f8. 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/PLF242209835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1cb60476cff345f02cf17fb129d0c8d49db387c1aee16d243bb632a886264c. 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/PLF242209836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f02325d256783c1235ad9c282b3bf48e1eb5551532722dd3925dfbc8537c1. 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/PLF242209793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309691bd117b66e8c023beab96051a8eba0ca4d17374c5d14d39f58914054a4d. 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/PLF242209495.
Wiesz co to znaczy - Remix - Bonus Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4acaca21089afed3dfd69e8f667a6a35b0e65f342a7bcb65e5bc3623f2fa4d94. 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/PLF242209837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0708cef81a8c14c8db2b21ae727d6710dc8c1d5988e4ef2179c706439bbb2f36. 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/PLR901800033.
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 0xac9e420483af7e0caff4f932f0c30750be1e520abd65cc70113e67d459192e66. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLR901800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31782c56e35f3e05bd22cd325ebbcce2c0ba25b4a5cea8c3e70994a0d0c69f1d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PLR901800029.
Non Stop feat. INKG / Miejski Sort / PRG / EKU / Robson Pro / Maro / Vander
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e968eb955c35f5ccc23bb59646efef0b9cf9109eacd7a39a94949099ad78f3. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/PLR901600022.