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 0x7d93c3519d4e6165978ade8a861262a818108e9143c6e91bf1138a4045e93ce9. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd7b63a0-e868-4444-9a1e-f9b1df485ddd.json and https://artists.proofprofile.net/proofs/artist/fd7b63a0-e868-4444-9a1e-f9b1df485ddd.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 0x5539aa3badd2bf37e90f158324677901f9ba2deea75f9d97955722274c00be34. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:44Z), 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/DEPI82433486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff0de49132556bc5ef46326371e176d08742203ed3e8084c23c1ba73a598405. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEPI82433671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12465affc4f47cc0f06e6985db923c757ef2127c2b46446907a5402430e8c612. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DEPI82433663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ca73709a0fe379935d9aef79b2b11bb4805628ad63a4e9c389f7b7614fda1b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEPI82433669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256c4882c6485064f39e2eb55a27c819aad9da361bfb1e629f4bcdc9772627cf. 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/DEPI82433665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23f8385dfb27d71f841bca785e15ee137d601054ccc8a3eda3f0df0f6404835. 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/DEPI82433658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3d8fab19da7834ee1a255af3db25962786b815b10e9bdcd75aa23c5260a5a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEPI82434141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32eff16fc998f1713d57d4e054c6feddf51f38c9017694c95a1f0dd3e59afe9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEPI82434028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155f8fcf4ae24efe406085d5e92f36011c459dee17c725c434b4c6653cbff9b3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEPI82434026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5b24997bbc18ec14fa8ea34b88829de0cef0e837f2cd113e882a43c2179ed6. 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/DEPI82434142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6918a0e0874c5e48d384f53586af23cab944d999f3031515c53efbd5485b7ef0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEPI82434144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7b908e9bafda348b758a3f31cf232c8bfe95d059dae4fd0cf0e70d8e4be6d3. 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/DEPI82434830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aee2fc2ad425074a1a1e8270aa98791e483480c619e30a1ff6e2397c114ec37. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEPI82434832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f23b3450907dd7f52a5e7ebb015a22d53b5966d70aaf4fcdc711bac27f2f699. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/DEPI82435514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b92f698c72cc1cf5df9a9e823b08d1c4ce453d4a1adb1e6e0b97f03fbe1b8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:27:32Z), 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/DEPI82434940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb810c6748f2bf8f567b2344dc45921a084092d140f447f663e30b7d9fa4a6626. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:59:58Z), 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/DEPI82435505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc584a02c782f93a354fe35c8c80b82874cf77452fe301d5d761d2cd6142c8e95. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEPI82435507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073b30fb83c2d48f34141fe266ed54f0b31843bcd152634caf10a50c5555ed1f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:41Z), 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/DEPI82435515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9cde7a4cafea822b7e14a0277d7388ea10678b7b6d476a375282de96777f6a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEPI82435566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6fdddceb6955a046e7375bcc75620aa5562aaa8d0ef25cfc888f9a1bef9cb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEPI82435567.
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