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 0xbf5dc1cfcc4f489a97b1f0d00dccd023427d4758a1f42b21241469950b4a0548. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a69c55-63a2-4a72-a300-90c499dab4c3.json and https://artists.proofprofile.net/proofs/artist/91a69c55-63a2-4a72-a300-90c499dab4c3.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 0x25f47f7284ef0b4228611cbef40fa85b848ef5930f716cf913ebbdd5372d9633. 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/PL59G2400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571befd98043e25c44ada746124ed014dbdb166f5b3212664432a318dba49c26. 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/PLS282300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd61d59f34a954ef4cf084ff89172ac56de04281d8ad45c5204dd98a97e126. 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/PLS282300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e92d8a477fa4a81b844aba799647c6fa32c83160f4ff7b05e355ca22cfa6fc. 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/PLS282300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992d67eae95f6aa652e6f0d2ee47e158e0ced5e61d7ace985e1cdf97e50bfecf. 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/PLS282300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15476207f9c87d20fba6822f0d3114160cf8264b8ce11c093f11ebecda815e50. 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/PLS282300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032504783e658e00f9ed56a01f7269f2bc4bcb0cea2c04a05bcac8fc6eb94b21. 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/PLS282300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896ba69e18ce4c30d1ea0ba69757459d62f7b8d08a73a36dd19213efd47181d0. 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/PLS282300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa734897f85dd64fd4b905806102ede5edffd0277b09a09fdef5ae55aeefb2d0c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/PLS282200195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2311a2625365dbac4c13f8bc71f50c0c9c117a99c30ff5a2f61871a690748d. 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/PLS282200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fd61d59f34a954ef4cf084ff89172ac56de04281d8ad45c5204dd98a97e126. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:12:33Z), 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/PLS282300087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682e455c11899f17b866ca017b7a520ef5af2bcbb001b55ff7eb1f85fc3edc1d. 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/PL2DY2300843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ed99ad097b3d5b85459eb69eb2f263c44e0de24b1d6586da773992c08efe78. 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/PL2DY2300848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a722376a6c073846d477ae7f7d3737c2e1c802bced71403f6b10a9cea7f3879. 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/PL70D2300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ae194cb4cb9a5a35ef4ff985eb54551181b3a76070975d7773db58456232e. 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/PLS282300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e92d8a477fa4a81b844aba799647c6fa32c83160f4ff7b05e355ca22cfa6fc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLS282300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784a46873697c1e0a61a6a8356c646f2249255997c967ac9b990eb9335cb1504. 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/PLS282300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e72863189ec6c27019024f6db2e5c0a7585f60b3f6f139ba643f4d553cf352. 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/PLS282300010.