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 0x8b4bde10382a84b5cc0c8df3f84e9bb4b578649686e65b417d6133d1d692d3ff. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f8b2934-082f-4657-b1a3-2a445d820f8a.json and https://artists.proofprofile.net/proofs/artist/9f8b2934-082f-4657-b1a3-2a445d820f8a.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 0x73f1e390e1fa2193c318bea7001b0fa777895fdb928e56575b207d8e15d1000f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ZARM02300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaa63d0de2a871a085041dbe5d1382d17424968c2c1dc81343eab2eb8a8011e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ZADGR2100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3f713d6b98153758b7a15dd2e2fa80112b1b95da1a78c1e329773b502197cf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZADGR2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2193d8dcb9fcdff72c4c2747c78c85d34bb2c6bb0eddc7c5c47e16f19b4420db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZARM02400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e8c6fe9ddf0ab98dc565a6c955ba3aa40762619e6e88c9b1ab9cacb7131fa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZARM02300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cbfb6cd10bb22e2f445b7a53769f243ba53f4a8825a59c450f7bf3dd394bd2. 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/ZBF402300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dbf5f0a4ef8dea6c31f9d55f5ad56f4f8856fe5cd07a63f14df0604ca296cb. 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/ZBF402300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9bba3586770c469c2cc0ef38dd06f85c5dfb34116b1211e666abd6be12d4a0. 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/ZBF402300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907cfa5af9dc513d2ce38c753ec457c27d479ad7e89f2bdac060d9696fa3eb7f. 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/ZBF402300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f94dd71228888c871dd3c26357e6b7321fe3b190c565e598d9e2bd1315dcddf. 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/ZBF402300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5849b5ebf81647282201648180db7c81bff513f5b029a0f2ca3f4a39e5898074. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ZBF402300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7593808b2cf2f202ba662539f2e7c28117c50f8eadb6548c1559bfb03b8cd. 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/ZBF402300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa180cb18f387f3140e6f2d33d5e547d6a209e57fc970ebad1459bbefe0b23bbb. 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/ZBF402300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847c214692995255ba21701089dd47ef08e2f6fe04226496b3fe61b4ebd1c27d. 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/ZBF402300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef15b0287f9e22d539d3f8fbb3eeea332037604dc707dd6431de058beac334e2. 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/ZBF402300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34932387e70421d3fd6023e81edb419374f8b6ec4f1381281d6a94d837325649. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ZBF402300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b6ac4bdc6b77669732fca44e84751a750028bf2c902c5a04ffba026275695e. 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/USHM92447442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b1969e7e8fa3784e9e265f98680958f001bb12c76a72ef581821946e22ec37. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ZAY362300957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f027e05cef6faa7bad4c5d851a36d65b50da20544a62912cc3bcc4536cbc3c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAY362300902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62caaf87e92dec6e7be1a68e1570ab941c3c280aaef69d3230fdf7bacb3bc35e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZAY362300958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92946a1bab4f196cf5dc4e63ee08360b306ac9a7381ee1051f4cce7b6f9805c1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ZAY362300959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ed0f0c1c9a22c87c88e7c31a7d44509527fe86f64c029f6994f9a97145dda. 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/ZAY362300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19502f5c589105ccad1060834cd28bc060f34a726daa99c9ce6a77b05522d09b. 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/ZAY362300961.
Nothing But... Afro House Selections, Vol. 25