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 0x314912ea0620b2bda1c6ab804e3c7688d803a9dd60d19375c09ee43e0bde905c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8dc248b-94cd-4ee2-b920-b7ccc86af30a.json and https://artists.proofprofile.net/proofs/artist/a8dc248b-94cd-4ee2-b920-b7ccc86af30a.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 0x94f5a7b03a74e35685071d6aa07dff5fd2ac97c7aa6aa11b4c7bacbef8a83a22. 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/PL20I2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b70648b9628b2d46f490903a2a5b79f835ead22e324ba8b5b96b13a3c6105e1. 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/PL20I2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f3792fc85142338de69abc5806f2ac4f3e084fa03c08eca1904a0e3cdb09a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PL20I2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290b180fe6cd6920976198c8d9d586e3ee8b6cb7ed7d4f70db59ecf15c48fe2a. 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/PL20I2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31cbd8e74edb51edd8a216f886257b357422e5a5efff82e62e3dfa36718486d. 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/PL20I2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26548e59608345d0de773d31cda775befb605526fd0c6678b7053b3687f4a6a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PL20I2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c43fe251a291a2c6d30a1735060540339d859a408a62e258c6a202e3256ebb4. 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/PL20I2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38600d9a786a9d97521f864b0f6e4601f6b70f93bf7fd1f850cba65a57184c2e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL20I2100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0d9c0ca78086879ab50e2c82728019afe1cd18b43d9ee85e9dc06b675cd168. 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/PL20I2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc3b1b64cc684c4959c142b593fad30bcdb268e17070a3f77015571d692f0bb. 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/PL44J2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d43be031d6c503c00fd5a781b3c6417f779c9736acd5308ddb721790aa40c7. 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/PL20I2100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f5a7b03a74e35685071d6aa07dff5fd2ac97c7aa6aa11b4c7bacbef8a83a22. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PL20I2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b70648b9628b2d46f490903a2a5b79f835ead22e324ba8b5b96b13a3c6105e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL20I2100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26548e59608345d0de773d31cda775befb605526fd0c6678b7053b3687f4a6a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PL20I2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeec626c2cce5471a49a4ba0cedf140ee87ac0a78fc9a43e7e633e04736ec6c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:02Z), 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/PL20I2100052.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8396edee06a2b76813a37eb5f874b7243b7e4df48c4ba8d16bc2bd9c9f197d. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/PL20I2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeccca525eab7f15d78954fb8f4cc39c681b44f512dca7c7875eba86366f9691. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/PL20I2100059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8184542d86b25637fc427b02b839db732fbbc36b4bafe243c2eb39e5cab0cab. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PL20I2100061.