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 0x828f1d11c392e80e06f219897bd91c345a4b030b1f7d5d7fe30d8b74f66e8c89. 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/a1d01c72-b681-4b93-b407-538a0360646c.json and https://artists.proofprofile.net/proofs/artist/a1d01c72-b681-4b93-b407-538a0360646c.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 0xb16496675a7b122428df73549ddad8abbfb2d2c1479253a08659abb72544892d. 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/ARF412200340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597874f952e89022a9fad0627406858aad23a507fcfe28acf38c1f630d6f9499. 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/ARF412200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac583edf0ab1f1d5849f3d06d2747f1945cdedc69f0245da926bc8b089a843ff. 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/ARF412200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f93cf80683d816eda6dd7b5a6bb4b33aa41ce2846ce9b8e0bbad246dae742. 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/ARF412200386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6685c6aa6c402590f1b09cfd1c05623dc88ea19ae845494a610d4ac02b170a85. 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/ARF412200389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994fc0df98822a2004a7f12d98c091172a04722aad50bce3d744143365f8d952. 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/ARF412200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a49e6d7f83d9918a8f35d15d1c59b1149a7a83c6ffbd487cc752a9b984bd94. 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/ARF412200385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19b227daee6ad11c1b41fd0adf473e7e7344806b0e0d608b120fd60d063770. 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/ARF412300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659740553c4dc8a9397caf6d4ea3c21121020f3c288d1ea8608ca1cc953b5d50. 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/ARF412300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d7586f7d05c5de47fa20744bfeb3ba8a6f53a58ecc1403e2278f408882c57. 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/ARF412300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d3fe1410eaa74f5a11402b1ba2c7344bbf894843204e323d354d34255ef76b. 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/ARF412300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf859465fb8267a7adc874c3692a2ce4acd2374ae053290a4c5d92b5b12473e9. 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/ARF412300032.
Vintage Café: Lounge and Jazz Blends, Vol. 23
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597874f952e89022a9fad0627406858aad23a507fcfe28acf38c1f630d6f9499. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARF412200383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8610ba8eedcbea53bb9286db001246008dfc6e56342a4a3dfe2f88c504975e5d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARF412300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19b227daee6ad11c1b41fd0adf473e7e7344806b0e0d608b120fd60d063770. 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/ARF412300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994fc0df98822a2004a7f12d98c091172a04722aad50bce3d744143365f8d952. 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/ARF412200388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b030621200e3ea18c83502cfe5347795cdd7aa6cb7871ca5ded4df2a7939a2a. 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/ARF412300289.