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 0xe2e0d7bfd9f1bc07d8a0d691d7e3ff5fd72a90a04e0406bad525b263dbc7a892. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a6ec64-71c6-4ad1-afaf-d265704dd163.json and https://artists.proofprofile.net/proofs/artist/d5a6ec64-71c6-4ad1-afaf-d265704dd163.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 0xf7033150519e0e7cb9951b6271b72ec17b48a6c7c01cf2b2250b95eca8b4aa3a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCADA1727978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa228128a561ec55b1aa0cee963e09cdab4e4d1595c7bc53649bd69271e45cb17. 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/TCADA1728012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939ad95d1e1465d25ee1758be892dfe3889969485e3d0b9953431c6ae38d812a. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:02:41Z), 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/TCADB1700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cabf0deb155cd96ee47c94312e2c96270a2d3de9c90e1d6dbc623396e12f93. 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/QZHZ52141721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640883c721c1f59dc81127b86f68d8732b31823e548296375ad735ffffd15698. 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/MX2972320243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdf8526a6584dbf6ed8681d9b5f4afcd4c37d9c1013063e06aaad99774ed30b. 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/MX2972320365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0bcd22ab72f1a28c1b8d9730b0f228905f97e4fb26c7700cfdf2d16c0a849. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MX2972320367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae94056823a53b8357ac4172e4649f21a682d28bf622e5576c22144be3796cdc. 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/MX2972320368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be2d5bcdd75f0ff2cc23bc2076d5b5465733af8ef360f0f4a7e70adb7f6e055. 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/MX2972320369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02443e93ad3a035db4178a7a48198c453ad15d123e997d971b4d686974525431. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:56Z), 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/MX2972320370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb333ad7685bf293ebf4aa50e94d77348cd9512edc4de7c26f5ec8461764c72a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:50Z), 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/MX2972320371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7400ce995c8444d55ba532967f8b1fd42c22b0266e6181658ffdfe9575a80c9f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MX2972320372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb161be67a1b6e38c527002df8e7f31cf47a88f5708dab5432a3c37dc845db5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:01:57Z), 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/MX2972320374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5057c1267ca79b7939a30b1486932d3c9c0d490e4652bd8c617d322fdb6e19. 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/MX2972320375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda75e24469090b5f95645956c4cfc7d3fe24d80a6bdeb50529e706e32d32b3c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:00:43Z), 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/MX2972320376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930959e5e907e7de9391eadd3882e384bc0ec7f6a4d691d0aca0999945220d99. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MX2972320377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7b5a10def3ae12e84eaf2d1373d896c0aa0e117c411819c32771f2228c6512. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:17:44Z), 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/MX2972320378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3ee9bec732c4f778c14af15b6d8a184e1b43a1284f54d9bea5a66cb0dbe7dd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/MX2972520763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef082fc5b3bb3954e0df503d94da3f12f8d208ebff6c08e0304660dd963d959. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/MX2972520766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42f8ae2e0b7a6c3ab3c1ccbe21997f2bbfeb9b6161c606fc1fe6a169f01c30c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/MX2972520768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fce5427583809b8be7bf964fa7f67954d819c63bfe0a737bceeaae0fd19fb0. 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/MX2972520772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b43dc7530b742bcb432d1428211dc132d5bb2745a04e78e01b3b5b9bfeca3d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MX2972520776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0562fcfae4b3639f1837c5beda481588741d60669df60a243493edc3c463a27. 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/QMAAK1731209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca40cf8f824bd893cf0adecbd082ae1fff347f734784886f3c7a6cb772f5f61. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/MX2972320433.
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