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 0xcdeff98a45eade8a45ca9780c301f9a2295157368a77b1a33cd002f4bcbda5ee. 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/85344865-3de3-4c5a-a304-693ce45ce657.json and https://artists.proofprofile.net/proofs/artist/85344865-3de3-4c5a-a304-693ce45ce657.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 0x2aee09050fd41449425c6a27b17ec27d5fb84373514fa582e81a5bf81db7d1d4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/PLA681601947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac958b24b77a5b6dedc5aab6185c5496a15f623002688cb5258c79d43ba2382. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA681601953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275ccdad5a5a57ea5b808fcb0d38549773caa410ad2d6eb9b5bce144b9126236. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:01:26Z), 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/PLA681602064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b07ce04a580f7c0528c12ba97d2f6bc082ddebad893069dd63e41c61cac6a3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLA681602065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd71f958cffa5ffd4901d3e451edc7a82bc2bbeeac56f029d9500c9bbcd029c. 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/PLA681602067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca3bbe321309a0c1ea6788855a40732b60d3738dfd3146c899c5626e091e36. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:33:52Z), 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/PLA681602068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e74b18c24c8376522e3479e8233ad8e9ad3c7216d50566988572b3107f3f29. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLZ471800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb6833f2fbeb3de29b6a27fbda23414109ee20774d584ccb3ffbc2f8eff385b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:31:21Z), 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/PLZ471800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d197be1045e12837178f3d9261d5a51c1324cf132b528b28d98cd184dd61b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLZ471800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78d4dcc75ce843d9b5c0579a4f8b52334de246dd7485cb2b0f3e49619ee8562. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:00Z), 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/PLZ471800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55da560368084210ab5af72e4f91aa19a3aff73c14126ef919db3e95e686a8. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLZ471800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfcea4ae4ce27d6b226332c2225e8f2335a0961ae106c5f943cbfd9a3545347. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/PLZ471800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a4d9e8197d2e7d8c6378824043d6d791f9100acba34850c72dcfa213992962. 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/PLZ471800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf41c921b90ec2ed31bfa7e499c1cc8bdd4ea4e5639bab60c207aa0041087c61. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLA681902539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627c395e29ee8588e79fd6be17521ec402227badc9c6792380a580acb688601b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:11Z), 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/PLA681902543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1bcf7b57ae61e689eee94ced2a0d601d1972970c6cc76c8f6d0393f9c6d0db. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:28Z), 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/PLA681902544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607709622a83357a7855117b77b8d8718ab5330e4485c68915147d20a23f5e4c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:26Z), 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/PLA681902545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4907d3cd38769d1bf4b78c42c0d02d327809157bbb830e3151357150607e5dc6. 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/PLA681902546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687ab5f513bea1ff82f3a44e4e216c55041b8ac515755468be77c99107607f4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLA681902547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b26213ba5d083a021379c1695daf07e67021180734eacb399e7b767c6a2cd51. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:43:29Z), 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/PLA681902548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045227874ef437c0c171194df6054d1ad5b02feda78178a4e47a271c209cf7f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:43Z), 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/PLA682202963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b5a6f84d6068eaa5df0c069fdc2bc0a486f265e7c78f1deb777965317cab93. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/PLA682202964.
Kormorany (feat. Szczepan Pospieszalski)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d71666b73ad433222682d24fefeab3cc19cc268917a284d2ea8ce9d6b0576. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLA682202966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e203dd8e920adcad9b3e80f711e5c4ea817451a007d3bbb19538c487766062. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLA682202969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cec04858d57bfe95287c91d3cbbff286b9ea6af7d513b537217be9176d12f65. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLA682202970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5047654ba2858ae95584a2afd6eed66eb35681ba0be2c6401df70868e8bba6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:55Z), 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/PLA682202971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1d7899c7207bf03181d2c06f31522d33706565ead8379b7f795f90498842a9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PLUM72400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eae6cd12788483de453dd2e1b6509d50b2205a32e19f3498022f3b4d428aab. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PLUM72400480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769b30939dc3e6a1e58c9bf6daef981f315be0a7d7c4af61b1ece3f0cee3b029. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLUM72400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d051634e9d22f53804a6a9d436f5f6b03bcd70437b35157992badb8c1fbc2a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLUM72400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad42caa9014c59f48c469ee98ca95c8a3c3c53342d7709de1f4f85f99c477d7d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:09:24Z), 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/PLUM72400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9251ef58de9de2c9201531b7bf6811f20495087a4b5b1da6ea9ad164a514d8. 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/PLC592200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9251ef58de9de2c9201531b7bf6811f20495087a4b5b1da6ea9ad164a514d8. 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/PLC592200186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c61460b29a0cba6e663b50531287d0dc6d3b3a5d502f39ce88022eecd6b825. 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/PL22G2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f67947e99bb67005c92786a756a554eab0eefa6896506bca3b383ca589bf42. 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/PLUM72400486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d269072f8f6d8a233986e099a9e5b711587caaa0b25f09461cd4a6971779cd9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLH181800615.
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