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 0xcbfb2090992648c04ab3c95638e6bb1684417477f840bb41f1467eba888ee003. 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/ff90d97f-3c1a-4f24-a1f0-96532a3241f9.json and https://artists.proofprofile.net/proofs/artist/ff90d97f-3c1a-4f24-a1f0-96532a3241f9.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 0x8e611139c5dd46d4eac617d37ac9db070579f6ceac26383a235bbc15304558fc. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ZA5VV1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb268dade99db2bcb06c2ec8b312f7b521d92514c33f6e5b1260e8052ac5f8b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ZA5VV1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9a63ed4e5494411d0deda727ef639d619b80eb17e839b65f6ba4fdcfeacc49. 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/ZA5VV1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5c7f5a32cbca21e79dd113e525cdcf138b275ef2406aeb8d84cbb090d9d6ee. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ZA5VV1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edb4ff74c028ccb86ac269fc1ef0e5286e23c6773fb0362d793794022a6f5f. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/ZA5VV1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b0c53f6d90dd24cc87e9309d8d6ffd36e868c9fd46a9fa0a041a3437bc32ac. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/ZA5VV1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249ae5844a6a82a3ad514fa26b13fca6b44f5e88f08d2fb1ba25d470f8db4b4b. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/ZA5VV1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ae2fa1041cbbc41b4dd745063fa00e724fb599864f84547d351e74b015b65. 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/QZHN82390762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f4e09e698fa5e90a74eb0451efe38f550ffc91073c3383676e9cb2bd2756c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN82390763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a8e37c2b14e1a3d0a5243fa8a789f698c09a5562875b060c79cde1b693cbb6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:28:39Z), 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/QZHN82390764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf276991a8084396bad886827e5f58aa29ed7c5cf64531478a8a5aba20dc737. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN82390765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27089e9aa6ef1752792b40bb7181ef8a8767a1bb2cf03b0d7490b9b55dc9f09d. 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/QZHN82390770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce54a29fff38b88a87ba19f892bb7df4f1fbf2b5204640d59512600559468c3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZHN82390771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d99c56e0e7d97c068eb6236a34cb3c86d729453a5b1c7cfeb320352a8442ed6. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN82390772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d1a11e61bdaf8c2a5937aaddc2071b897b0bbd4b7f865486584b4bc2566280. 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/QZHN82390773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa371b4f31bc47b1d29038ace9ce2236db63ac1cb525c5f2e25e85bf773bd826. 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/QZHN82390774.