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 0x914ee54ac1c8c29cd79a7ed64307ce8eb9416809b58749ed8832da86c9328815. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a380861d-88c6-431a-84a3-be204a06b577.json and https://artists.proofprofile.net/proofs/artist/a380861d-88c6-431a-84a3-be204a06b577.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 0x62d1ecefae996e93a7e893ead71717e15fe676a530000e0d1427a2df606014cb. 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/CAJ621342002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025cd4fb10b84d50ba33190f0a5b5d5339fc7077a33ed785f47efe55fff896d8. 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/CAJ621342006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d3abfa9f5f584a67ac0a556497eedc017bc49eeaca62bd9352edabfee2a3a3. 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/CAJ621342007.
Parksville (feat. Kiso, Soulja, Limoilou Starz, Shoddy, Chub-E)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cfd422da2496ed7d323fb489e369338d780c35915779f4a4ba3d48257a52d0. 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/CAJ620920004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdee36aded02cb498fefe3adb6f9dd2ea1e2bb5f922dd01f7434eb04fc07c84. 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/CAJ620920005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0448eb7337a9bee82e776b3ad01efe284c449e256aa12554bc78bcd30b3728db. 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/CAJ620920011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593b9299217243488cc1de2025a51e68ae2fd47726a7930c15eccef69c239d85. 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/CAJ620920018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7400502fb3dc64d7f4d98999d58919a8d851174243af9338844d593eeee87e1c. 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/CAU560600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dd215e276cd4b77e6afaebd883d994794fdc98ebee8a99021e00aa4e40edb7. 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/CAA0Q1312201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149448fe0fc35c0fdb8eccb3c489c60e78c46d74e1a0e7e35408caef87b3c017. 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/CAA0Q1312202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b318208cec28ebe4de688e9455596cefdc3855c5dcda8c53f0ab5bf3c2387. 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/CAA0Q1312220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00307a6f5bbc7058be942ef5d51c5fbcc4f886a9d266ea43562097e41833174. 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/CAA0Q1021875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d9698ea9ccaca46cf82da50565808941ad1ab4ffef3690ac94772d62c213df. 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/CAA0Q1112402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea288e77176f6cc9455adfdc499aeadafd0d64c90f506893890ae3620d86103. 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/CAA0Q1112403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2182e361788b2e836ff3aaee5da837562a1f99704a4740fe6662cc9bf9d9179f. 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/CAA0Q1112404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cb25ae677f5fc99d045f7b19cdcd67cb33de1bb98a9a318fe01b7838f4568a. 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/CAA0Q1112406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f8130fa361be8ae3be96561c3660817a8c5d8ef2a2e63d8b87f92d87feae4. 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/CAA0Q1112408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b18e9fb5edc62db90f6babdfa87e69c73c56f96e7bc7b160ebc9d6272abff2c. 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/CAA0Q1112409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8407eeb85877509b20105e796b1d9fe304d6220ffa4d05b52b8746ebdf05e95d. 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/CAA0Q1112410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9e75c118d660725d5966926932326dc4823f313b76a91725cc3243a1e7d0b. 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/CAA0Q1112412.
Dmanyak.TV, Vol. 2 (Un autre jour un autre dollar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c07e25ac59cf67dd7663630e120989925fd3c5258f927c58c85ca73b27bb686. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:25Z), 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/CA6E60500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f27654ffbe6f3a4a0e51c30f1a211d7d232035350c2645dde734e192d75f0f. 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/CAH682000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1f88f947529619d30f9acc59a24325f2b661f62d7aa3c9a70777a5afe86162. 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/CAH682000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde7c960429b18a15a169bff39c4d5b87923ac9a11191ee5bc3cf1d2dcbe0ec2. 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/CAH682000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6ee5fcb0eb095c81e828448ada500566e04e0f35bd592d12011f068171e0b. 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/CAA0Q1910003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1601880746e2ed7cd82fc6ef68ee11a75a85425ffe67eb53afb57c5f92c1710. 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/CAH682000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae80d9ca90ba3231d4abbc2ad841ef6cd7cd2bf25ba2ceaf5355c09f898496. 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/CAH681900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438e96b22e9424b333c49a04f79240ee63dda1492645693ba06b6b508f9986c5. 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/CAH682000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb0c79e99bf5941b439fe163bbe3592f8782277386a3cb1f1b2cbe7921e4ccd. 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/CAA0Q1910001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215151c04bc0aa5e5a9f3525f03d2dfdebfdefc56eb3799b46b344646b452d51. 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/CAH682000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0679c0664a1b31dc8be6af437df00173c0a78ca18bc5d150265e3affbc544379. 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/CAH681900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de3a7ba68e27648a5654634070cc6a0559f990cf45ca088c16510af39951ed2. 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/CAA0Q1910005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a66b6d03187fd546ce8e73f37472e08da5b751f2822dd1547749521297c3c9. 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/CAH682000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1fbe91fcc3491d824b8a3ceac5cf389214ed8cdadfd524b414e5bb3a182a9e. 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/CAH682000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68398adc43c042917460a27ede463c9a2c49a9c57ff7b456b0ca8f586a3650. 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/CAH682000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b37090f5fd91a821d58806321ec53555020ad25b34e153296f51d53668b390b. 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/CAH682000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14812bd007ad47b9cfd38293a28a579df39ef02faa9e27df303b7f4dbcbdba0d. 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/CAH682000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aef9ad68fd66cae678664dd6c3bbcd919b05b39579509b55358360fa09fd3ec. 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/CAH682000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f3f2c256c3d08337490e56a40b8918a780f8eddff57911ac7f31505803831. 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/CAH682000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eabcf8d9d948e896eb3a6e2b47cd333a6213ce85950b4a782237a3e1f7cce8. 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/CAC0C1500330.