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 0xf5d8669f78fb2e634f36f4134cc46d3af0f0da4e5d64358fb45be7d9fbafe074. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07f4bac-ebfb-4e04-8c47-61cff99b9f0b.json and https://artists.proofprofile.net/proofs/artist/b07f4bac-ebfb-4e04-8c47-61cff99b9f0b.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 0xa35ffc662f2534702373d2de9975399f763187bcc65a633d5fa6b6a446ef2cb4. 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/QZMHP2307087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04206291bd6668642432ded56030b6a10187c1950944283e8b31e47ed9d975f. 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/QZMHM2340986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7c5f7e761ab09041eebcabf0abb8a0575d92f8fe2ee97e3ea4c265d5d50ef9. 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/QZS642379119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0ceb5db2b24b211f7f1b3d844ce86cd66e1f51739ed392859fe44ceb91bf6. 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/QZMHM2329538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607a176c3ee564881b76b40b7fc2b56bb36e3436866609960b2ced7eb4fcdd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMHL2399231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d19ea32d5bfc41491492cb9a6db990eb9e57e2eaefeb9038a79a0019ab8e1ca. 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/QZS632359970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea13647c4250a91492f2d3656d3494905da7db028bea3bc28b397b5d2fca6e4. 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/QZS632342542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bfda106d5379b976c654ccf2bbd4cbc2226cf268d9387ca66e7deae104376. 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/QZMHN2354679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2c194f2fbcbef81a59e1ce819106d997f0596b2921b519a296a7a727c4f312. 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/TWCC32120749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90350f96931da0c94a9a0a37fc3a3556250f3e01a84abbc4d5d6333402378e5. 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/TWCC32120751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26ad6f81e37efa6bba71d52823199e35a9dcaf15dcf453a6676f7a23a9c94b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWCC32120752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af36049f7cadae5030a23796b0a7e57402dd337a4cb3a92dab56243aafd5592. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TWCC32120753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8d529abd713bee0d1ba79061a0b3da545f29500fa3349b00729f8e9e8a5053. 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/TWCC32120754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8784f351707b69978ebeb8fc5bbcd7eb4786dbd47debda9ccbf665ecf72bb. 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/TWCC32120755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a026032610c6bcf5f0b9e41a60fe2dfe5d50e9c2911c7c7a967ece9a4cfada1. 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/TWCC32120757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2e07b51397fc4f174c1fd67d225c2fa463bb24ae4bc923cbc0f86dec7ad4de. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:47Z), 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/TWCC32120760.
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 0x5bc949ebbf899a689c7f6af0bd6db0256d6e2c0e2b04f6ccc590979dea240772. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TWCC32109939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d36f7ab0b86a3a4b6cfdf44529399fb0238d344d9b4cc6982733680c6a3a7c6. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TWCC32120750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0910668ad349b7dd0d1ecbc7ddabf32c16813645e6925ca5d96a0dd6004eecfd. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TWCC32120756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3001fa3910ba93886d75254b774be04740fffbb4622608a0835fe8f8ad03b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TWCC32120758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd7f43ceef8185562c77433c6be119faab8426a32b9ca478d3374478374bdc. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TWCC32120759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82d4c6dacc2ba4bc5f200c7199bce8f68d51d55af4e5bc6511233cd6e2d5a11. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:54Z), 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/TWCC32419880.