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 0xe303f1f015cfe6ded47bdc22e2de526a79bd580697d26c15fe1cc1982ad3a6be. 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/fdfb3ab8-ebd2-4630-b58e-20147c64bf81.json and https://artists.proofprofile.net/proofs/artist/fdfb3ab8-ebd2-4630-b58e-20147c64bf81.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 0xbcf28d5426a4e52543bf9e331bbadd51fd040d257190ede4ba2a751aa6faf2ec. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM9NP1600202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25c826a20b7001453e076e5477facc5de1cc7da736a4186806ce8229006d821. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QM9NP1600203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cd00795b5ebb08cde7485ca7c9d496fa389a22a3289b271b2aefb2b6cd9100. 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/QM9NP1600204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff6a1749b35e74527d98e52f8f6d9e295a3622da539547108936bb6f9dcfbe1. 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/QM9NP1600205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190d9a17ad5ad378c5a6e1ee0e3026c93607b52f0ee4222d1f1ed6b923c38b5. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QM9NP1600206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e83b4ff566bfbca26862392dd88ec763ed5599c6f0f3aea2e22a9125e136f4. 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/QM9NP1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0980637601204ed1bb79418ae62432a605943b05147080035378f40411ab427e. 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/QM9NP1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b82161991f29d1209281956d9a022685416b0fdb530eb7868d6d9f998e5e1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM9NP1800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4822c96b5df83399d28c76c01b1b226777b10021890fc1e731c3efeb7c0016fe. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM9NP1800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f0cee7c7ccb87e39c1a8cb63fb20de0aeb7ebcd84daac7cb69188a6b292bfb. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QM9NP1800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e64d58ebc51973bdd687401c0c194fbed3d773abf90a901af14905f08820ef7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM9NP2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124ae92da2272c0b751aed767730be2fb8bf305c23b6d651971f7af381732f0. 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/QM9NP1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6524c6ee57cedea2484890562cc9a108c1a139a304d2a24fa227b88cb6cea292. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM9NP2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1cc781fdc5e46e43a4c3ca6c7ae3ac381ec81270ee6eb76b6fec6e7372c194. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/QM9NP1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3981e00f3f05def2892fa1bacfab7e6ec7fa3ff4372660874ebaa4303595c35d. 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/QM9NP2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7949f3112404e149c7be0e8ede2a4f87909aee696b5099dd387e84f9a189ef. 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/QM9NP2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bc267104afcbeced910273f1b974e63146dcbbec012a401c2abf77416a480a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM9NP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bdc4ffeb3688f136032e7a740ca0b278441603c75cc217d476f268fe9d6546. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:29Z), 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/QM9NP2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c65370e52910c41fbc2bf6f2f1c7d89839f1d496caf761c812250e237e1eb1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM9NP2500004.