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 0x58ac92a762502e6249ac071a13b01de66d0e506f799933916f674952f200bfc5. 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/82f3cc70-4c18-4775-a4aa-e7e64ba28e8a.json and https://artists.proofprofile.net/proofs/artist/82f3cc70-4c18-4775-a4aa-e7e64ba28e8a.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 0x6fbe4b63673794a9488db214efc8657f2a2bb96826997dab7a6cb72c80c15d6a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEBT92300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2e8b6b84f9970a9804833bc4c3b713a58360cfb77ec54f59cbf242cf0c26ba. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEBT92300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8ea8474c68852de5f66eb42e030e66b7b1dab7bb3e61c14c9f4a1637aef3c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:03:33Z), 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/DEBT92300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8131fb98062ee7e4312dd8d59cf148d07e462cfe0a3a82db2d54b6cf6435e19. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEBT92300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c8353c3ea999d484333e5312c647318d355018509a920ea78bef484439b669. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEBT92300149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69d20dd5e7dc0489d426f2f81af44ec2e13cf79d6e9be014f2b61beb9722f8a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEBT92300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a4b830aefd319044b0b400c759a3e11bffcbab902a45f9b96d22c740216768. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:43:29Z), 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/DEBT92400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1ba5137069ae0d9ab0f6659e8feed6ba5a08e8b161046bebd8686ed3cf20c4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEBT92400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce565f9417d796869134ba2c7e793bd9a6493a80f9c0df147629f286af274c00. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:10:04Z), 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/DEBT92400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d72c749ab905b6a5513ecc2564e03adb9ed3c5434db74bd57ee54e7b59ac23. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:00:21Z), 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/DEBT92400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc317921c0e9502fcd7e5e4da0d1897bd3def99d085048e0e8b1fbd4d57b9ead. 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/DEBT92500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103c8ff2033e56c72d4fc8387e642198e4d4aa3f5f85f16d655c7a79005d298. 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/DEBT92500042.
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 0x7736de465522befe37cdf7ef2defae29565f2d2273b6f30a0cd854cd0939dc98. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEBT92500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b54272f351a97bde0b48d810aad9921f6f9dfd58886e2728eb3a8c31f71321. 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/DEBT92500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c17bceace71e3e956520b80b29d60a9589988b6c8a6a820c209de26e5a17cd. 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/DEBT92500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5285bdedd9e6c3d7d767d7941188aabdcacf9c237670f93724473e46833e4b9. 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/FR2X42435092.