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 0x762a6131337fa14c414013cf9af22512c38829aac6cedf939625ed23d8520a77. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a87eea6f-8ded-414e-843e-f6b788ec8d16.json and https://artists.proofprofile.net/proofs/artist/a87eea6f-8ded-414e-843e-f6b788ec8d16.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 0x53108de57f7ba122df18e719408fcfc71522c16b0b0ba4be362636d42f0d60a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITD872712602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21050061449c1d632cd8bdc2da6036adb45512bf5b82c723e2a38b3dfa0c43. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITD872712603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e77c1d21bf84a43043b7aa6f11cd4795ba4c11576f4b435b708e48fe5827083. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ITD872712605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c595245e821f070d55a55cd3effa0fe26d73ebff1034d5cdd97a9e1d4918c10. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD872712607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33d8fbba67a4549c64115dd2db0256671938d767f378ecf26ec7d2408919d0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ITD872712611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91695928608bfafd02b12a221c921987edcbf7ae0b534c76b9b697259c51ab8c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD872712612.
Paris Jazz - Smooth jazz et chansons françaises (Les plus grands succès et tubes repris en version jazz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd811e2ce85f239a4768eeba5d6ee3fd1df36fc6cb6fbc3537ecfc280e9550. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ITD872712601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33d8fbba67a4549c64115dd2db0256671938d767f378ecf26ec7d2408919d0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/ITD872712611.
Music for Cooking Delicious Recipes to Surprise, Vol. 2 (French Cuisine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c595245e821f070d55a55cd3effa0fe26d73ebff1034d5cdd97a9e1d4918c10. 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/ITD872712607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4ac3b9299d8bb8e8766915f86b4d701293d9f9dd7aea66a3444b8e4a5a7800. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITD872712609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53108de57f7ba122df18e719408fcfc71522c16b0b0ba4be362636d42f0d60a4. 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/ITD872712602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1a9bf1db06f729bd598145efa68c9f74084e67c2920de7c8d318b029134986. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITD872712604.
Ticket to Paris: La Vie en Rose and Other French Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91695928608bfafd02b12a221c921987edcbf7ae0b534c76b9b697259c51ab8c. 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/ITD872712612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21050061449c1d632cd8bdc2da6036adb45512bf5b82c723e2a38b3dfa0c43. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITD872712603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53108de57f7ba122df18e719408fcfc71522c16b0b0ba4be362636d42f0d60a4. 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/ITD872712602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16db444e3495ce2b293105fa874c28bdbcc432ba86fbec67cab840abd23df22. 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/ITD872712606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ee372b37ec3f39b9dd1c27ad5efb6723c8b4d08a85a096fee565bc2e1a1f6d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ITD872712614.