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 0x530b9501a73e7465615ef8107daa3080d3f6fc6579e6417c085bb33817d9a7ce. 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/8b86dc62-235d-423d-856c-d541fbf2b73b.json and https://artists.proofprofile.net/proofs/artist/8b86dc62-235d-423d-856c-d541fbf2b73b.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 0xa7f2f418530bc5534bba5c9e10d8c39c2641ee4074046d32250ff4555a40092d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ZAO7Q1900016.
Nanini (feat. Nkosazana Daughter, Azana, Musa Keys & TBO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead2a9662d79b110d24808d4f264de1388dc793ea035975956c73d2662f3c17f. 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/USUYG1419776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5369c32b733f37bd01c65abc5035f10fd24644a2a8567ec6f24dd723c0586b. 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/USUYG1411534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfbd92c59ee3587b1925519edc218957c2b4fb9a6b6a586730efbd118d3c56a. 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/USUYG1419778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3244413946922014bc6e0b6bb74dea494a392cab012f3ec038d0615c709ec. 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/USUYG1419780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2fd604a0c8c24e7499e80649d8fb3aac3f4db4b6d1c215ebbe380d68db074. 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/USUYG1419781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d4fa874a3f0f1440690c1fb025f60693dffc28e86a8bb756aeab375a85b35b. 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/USUYG1419782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2abfbb71ea30c1a2a7bc1f564e2d988793e8a875186065f29b2db259554bc2b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:22Z), 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/USUYG1419779.
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
Intro (feat. Amukelani, OhTeeh & Don Scott)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5e4ecee8ad4e018d5ee209a15944017ba80a0a29142762af7c3b2a8b8222b7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUYG1419775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed2d49f33b446374b75d89f9a8d541aa260337760abdf8fbf4fb55edb2476e6. 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/USUYG1492466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc465699bca7657a7d30aa5f2e3bd4388d590dc32d6c653b5665010ec3f81f9c7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USUYG1492467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea75b0933300d721c40b571b2dde4d34ca47add59b2ceca377b9f65c3fd0261f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:24:53Z), 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/USUYG1492469.
Nanini Na (feat. Nkosazana Daughter, Azana & Musa Keys)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dd9dd0a1526c4c4dfde9588284db53108b314f2e1bd085095d8b51226450cf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USUYG1590750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d4ba711b687537d74975cfe2785b1c682894f9adfbd52eabd7848b609ae3ce. 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/USUYG1590751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd57bd39f73e35e9634a9a10d71bc9142593393c73a92d2995c4247d84da146. 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/QM7282109655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c0e07801d552eda3ac4cf8ab689ab7813dd9fd1831a56728aa9436d384541. 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/ZAQLY2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd57bd39f73e35e9634a9a10d71bc9142593393c73a92d2995c4247d84da146. 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/QM7282109655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c0e07801d552eda3ac4cf8ab689ab7813dd9fd1831a56728aa9436d384541. 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/ZAQLY2100009.