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 0x33cf4f362907305ec570edc3aa2dd4173b96942339d943dfee0bc73a7c6826ca. 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/e5005f43-c559-449d-a5a9-577aaefa2139.json and https://artists.proofprofile.net/proofs/artist/e5005f43-c559-449d-a5a9-577aaefa2139.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 0x680ce0e26a0bcab6a0cd68dcbe83fc54cd873890e3f932c916eac9d54bbcd387. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGT2357899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa889dd11158fc6bdf310dec7d191ce37879a3fcf18572f57f7d1759363646a36. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAGY2335879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3953b1a5de8a3365765e3931bb36483c5b45d4d1065742a7687a7618737c23. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAHD2350725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014dc992588c50ccccd937909da067c8d66dd13491e2db54c3dd3ac45242f5fa. 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/TCAHP2364337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c12127163484565af667b56755bb344c8a1f09132c38789aac4ab70ef1c3d3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPI82411928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e33553702ec6c7ffa928f3acfea0dddfbcf51039e128ed9b0482905c2a0ed62. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DEPI82413154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec26be1abf3a51ece2bb3f916df0e76aa4248d1542b855c414fbe57ed3ac410. 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/DEPI82432064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2824c08c803960deba6ca60d05e6a8294d5a81042cd7c8a1e79d0b5b0cf9f03. 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/TCAIR2447403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd225db250c7886848cf601e854339c6c2c506deeb80ac18b8953c68c0d39108b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJG2549223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7148031226882fdec508efa14ddd5be0c33c3a1a566137b59361ce4aa17430. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJI2511426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223af5dd8f10fa412f45e7ffb063c27f8d9f05c3ee8ac5878c2d6cda8926effc. 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/TCAJY2547893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9c3a0c97c0ea50558a87739a8b1e0055533269c8ecff72354ee6a52b93ec29. 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/TCAJY2548066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b9c32aa7463f8153532af9627c5d93afd0667e0719090edc1400f4c0db50e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062240713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558fe2096972828b07f8569535071adf56e48c5e929aae5f3c701361222a994d. 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/DETX42400008.
Mama hat gesagt - FABE BROWN Extended Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc3190c4f925a681cab78c592d5c7a22ccd7a55ba48235dd43f536f17ce29b2. 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/DETX42400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b9c32aa7463f8153532af9627c5d93afd0667e0719090edc1400f4c0db50e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA062240713.