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 0x6b8d81582becf5bedd186f31d08bb34b3bf3dab6ea74cc05f505206063038ea5. 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/e7dfbb61-4439-4c9d-92f5-b87ba7c9253e.json and https://artists.proofprofile.net/proofs/artist/e7dfbb61-4439-4c9d-92f5-b87ba7c9253e.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 0xc17021e03aa9eeea59ad6ff1f733471c89dc0e0175e321e8d26585d01e1e0c5a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAGZ2360066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c03290dd32255e69116be619d2c20df415727a1e6b02c1a321f3dd56c5ddb02. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:51Z), 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/TCAHD2331268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cced9762291ec7b31b5fd57b700008862b392b5a673a4afb8a5b21ee5e5256. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:26:53Z), 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/TCAHE2331199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd861501053255af0b8b9e3de715fb628ff07ee9ca79e09fd9e8dda8dcde53f9d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHI2316891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949323330102a78820272ba97ac366088f1d318d1b265560b8191d3b876d039b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHM2305437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bebdc14d064ae0e1520e45a9a7bd2b9c12834da71fd039c58b3d3382ba34d9. 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/TCAHN2357475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87690b78a3ef736c7b1ac029c62a8b6f5fee6db48a2ba97c36c1ad19ff46b04. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:46:02Z), 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/TCAHP2322555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef40cdfe3f4e16a142db1d7d00d4ae4626e0a993ce7db69d62e80847e7ff4361. 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/TCAHP2322508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f6750e2c031227bc736def8f88e10eb49863cba8c7dd88ccda1f481ce9a1cf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHQ2347825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d648d8cb881c148861e75f1e99a28e869192d8017d1cd511779a6eaf8bce1b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHU2418168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e65b2b29810ad70174e77011249c8686c79b71957bc41132854f6ae21878134. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHY2443924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f260b4730a98c617f82ec7541d60e98d920e8ea3af04f7155471e34011cce21. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAIC2497812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6b541fbfdffa3f955ab9ae8001cf5642b3019148c90870becee83ac292f87. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAJB2420256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741a52fbb2709c33536c30a384d1e3b48ef62cbd3d316e25e08b1f6ba99471e1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT65Z2589782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0caa715ab5a4df9e8563d9c1913d7f19adef857cfdb0ee9c36d7fbab0ab9529. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAIV2454911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05f4ac2bdc6f4874462c613b5098ca00c91ea964934c09abfa94f03e70a0ced. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT65Z2589784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d541d712a0cac3e955eac7cc6b1b49c43cd5853b355dd7e6fa2c937cfa01a9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:40Z), 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/QT65Z2589785.