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 0x07645a537aa2ae928f8232820617cd2dfbbe6244229550cb23f3024b65e7d3cf. 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/c2051c61-dbbd-431f-93f1-e61124cdc48f.json and https://artists.proofprofile.net/proofs/artist/c2051c61-dbbd-431f-93f1-e61124cdc48f.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 0x5d382ed5efc98229e172e7116bcb1110df82d559c44842e2c59154bb161d566d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZNWX2329859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb732db41ab1ad13cddd78e2c949263b7178005d08df83b45b80d7cd097f31d2d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWX2329860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde95e95ddfd2d0ba239d3e22fa6d57499abad5a5819062aff44ba7be3fbc7852. 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/QZNWX2329863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f6ca5f201e55d2a1bc491cac8549e57ade8211ebf6706b61c9e39f71de6bc. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZNWX2329864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d5e637ffbe8b2a35d66add6229236adb4e1922e8a6b5efdb2ff0fc8e80a71. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:38Z), 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/QZFZ72491704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b0f44c75dcd2759adfafafa95f3062e5bf59432c5a0ef97dbb616d340fac0e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZDA82482274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7d01f5e39a5f905f0d5f58bbb377cde44bdb9bfb75e936f2f099edcf73933a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:47:21Z), 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/QZNWW2411484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008d70d577b96a7e6a5c165fe9e80b02c58a2681688d04a397ac6825f5805daa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:25Z), 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/QZTB52480029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba236df02bc39d4904ff0e7a58852cba2f9cb80c2d42228d027070041b312dd7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:09:41Z), 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/QZWFM2411554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb2ae378c6cf5abbf4ca66c25d5d3df570cf0c3da56c4186ce6731a8f42c7ed. 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/QZZ7N2417438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f66059426197a5c1e477a906e7eff7ed6317039523cc598c7dea5cb9900210. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZZ7N2417439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185371d8d3dddf3612f49d5bcf9a18555d3d1cc6c358b71d7a27979b484ff306. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7N2417440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2493f2d185f32fc49d2b3bd222a5139ec6ae62eb9918b8f527c42442030ebd1b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:10Z), 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/QZK6M2599245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90377ed2c973039c6b38b9b6fb419f8f1a057901d270914eb6888266fa93b9b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZMEQ2540494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df8712c74ac5fa9a7aead14f94f83859ce7fa945dbbf4a60db0748e3deccf5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ762525526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901c235181af30650bccedc57c61a57b1cd840d4779393dc0c70d1ec970ada73. 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/QM4TX2459158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a23728dcae6ad79f745eb0cc2d5fd1c7150354142ed63fe6bb2c5770c97e53. 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/SE6XY2332230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df70214334f53a96f188be4a357f069f8fb5edec80d31c8d7d268b8ccc5791. 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/QZK6G2310757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0768b9a58b0b3e7186c8430cda281c0246d844ca8c2424ea40497c8b4c6d4ee. 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/SE5BU2526120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a9172335cb272cd2739b590fda283bb7bd17e5e2aa2435fde9b76f157e608. 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/QZHN42538678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587d372f0c5c6de4be14eb71f0938cc8ec2a02356e5eecad2c88b278df74842. 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/TCAJA2444022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a9172335cb272cd2739b590fda283bb7bd17e5e2aa2435fde9b76f157e608. 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/QZHN42538678.