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 0xeabb6733ee4694116a5722a6cbd5ac1750da47047b08bd81726ae3ca16c73f6e. 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/41af1e32-4c1c-4167-9389-f5ced3d7d599.json and https://artists.proofprofile.net/proofs/artist/41af1e32-4c1c-4167-9389-f5ced3d7d599.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 0xcc5f1d21115df0b8d38bf51c0d774c0ac9d8c8c9eb8027236cd237cd08b1b7c8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLF242210750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe039dfc1dcf33e373456bc8f61f0dded16ea0c4dc6e5fb0e2decdb2589b4c48e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLF242210751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc941439c0b894e62566a5a41fc97ecc12975920d7b500854bde75083b827e71c. 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/PLF242210755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dc9b2620c9cf8992ad582b5b071de2b2b7f69825054fe1b0d5a8b22728a1e9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLF242210758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5344ad166674a582c25181297753e9feccbede3330735959d1d1112ff666d7d. 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/PLF242210759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9f72eb0b1d9da4fe017269827f1857f5bf12bd12f2ee7b2cbe268378a4245c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/PLF242210760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024f1b2fc2a96177e48e786eef54335f3d72b41b7efbfaa568df18fb4248c1f4. 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/PLF242210761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffe4d5227fd1adc6e10a7b4f44bb356a3a3fbe4ca63eb4a848857ae2c8e7052. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PLF242210763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64a8c4f1d0541435a6aabfcfc1af00c0a70c10adbe8ad7d44108fea5db4fe2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:02:49Z), 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/PLF242211589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301b513351a6494573bb9128164c34974afd232ba36acedf4d612bb6e631e2cc. 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/PLF242412429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55721e9736abf3e5e54baa6687e585ddb43ee52bee70edf20bdf7b358cb9ecf5. 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/PLF242413447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038dda7e7cba1f29dab07f787a0e5272e32272e812d42976c535161c63a2b616. 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/PLF242413594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2252f6ceff336d20015f88b46b0a24aecfbfbf13fce8a2ffbfd52fe5cc140. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:58Z), 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/PLF242414160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0288d8743982998b19a48587bd4dafa92f908ae1d333824d431a428175959573. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/PLF242514265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac37305c775c729aef6469a92b18fe808777abe85dfc1bc92167e868ba5ba9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLF242514539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f558ad47fcc7ac8d806316df183c3304398dad6826a7e171da2bd32739f6366. 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/PLF242413509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d93b03682fb700da6560b2fb52366e422eb7ccd38d3aef8da1c8f9d1a3377. 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/PLF242211681.