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 0x3ac2c34bfaa3bbfb3eba1a1737e1e9256dba8a57d616914e8e4a2959327e80f7. 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/40f78c12-4430-4826-b73f-b9cf43f244f0.json and https://artists.proofprofile.net/proofs/artist/40f78c12-4430-4826-b73f-b9cf43f244f0.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 0xb049182edd89e6ec816698f434057d18214e583f58c1ffae316aaaf612a12dc1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARF410500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066a545681e8d27e73b54e42260d3d4832dd67fb0401563ed9145c303948c2b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ARF411502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9b19f95262a3b12a4a241c5cb5ca5b1f588e6351367ccc9284bbd536bb1882. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ARF411900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacf33ffa46d8640b4c5928b1ac5877c2e3b2b4c98d603563ae539b3f84a6024. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ARF412200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a552dcfd0afee3f4fde5a802c37e0d13a47a47b95ad543c37f25287b4bdb362. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ARF412200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad5f802def01f4348e0836da406daddabcaabb0fa07bb7f76847cc3c948abff. 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/ARF412300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf4bc75ba9853e236275dadef735fe6068bfbef8ac2f681571275c89012f1f4. 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/ARF411900352.
Vintage Café: Lounge and Jazz Blends (Special Selection), Vol. 19
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0433cd5a14f19d555ebf5064f88d796c9c8de02131b4ab86623a16407a6708. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ARF412100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066a545681e8d27e73b54e42260d3d4832dd67fb0401563ed9145c303948c2b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARF411502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55318b3ded002840fb9074c7cd5d32494de2a785e50d05cf4d3e7e413ccb464. 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/ARF412400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d97b0d9c24c57f26ceeb7345cb9655455053ff36e0f58dcb99346eaf9100cb. 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/ARF410802109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066a545681e8d27e73b54e42260d3d4832dd67fb0401563ed9145c303948c2b. 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/ARF411502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa473c824f4347e947795ab36557aff5e4a07b4968103a2e8c5084fa5be2dcd0c. 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/ARF411600152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e819dcae904701c8939ba69c12634cd6da6d94e5cc0af2e682385badc707e7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARF410600218.
Vintage Café - Lounge & Jazz Blends (Special Selection), Vol. 16
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf4bc75ba9853e236275dadef735fe6068bfbef8ac2f681571275c89012f1f4. 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/ARF411900352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9acd1b91665594c1fdfcfc1caa93910cf017c142dd176061d59eaa2eb691b1b. 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/ARF411800578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f21eff9e325acff72b8d96834c9013fca29a3eb9c1a52f7344cd799f604710. 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/ARF411999059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0433cd5a14f19d555ebf5064f88d796c9c8de02131b4ab86623a16407a6708. 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/ARF412100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4eeb56aa6f46d84a1565b865e2bc90ce17c88dafae3bdedf5ee15ca5d0f3a6. 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/ARF410801991.
Vintage Reggae Café - the Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2882ba11da7c671eb6a08648601fba4b3e03c2bd265b8df6088d5645edc351e2. 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/ARF411401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad797eca8a0d5588e619eb24625af2427de7eec82829592df912c0ee3f5bc3. 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/ARF411500985.