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 0xbf3530ae44980f08ba42ebf8260722fd99cd0338dcd3aac90921a5871227fa09. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf06920-cc89-4310-acd2-98e74cb1b0a4.json and https://artists.proofprofile.net/proofs/artist/3cf06920-cc89-4310-acd2-98e74cb1b0a4.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 0xc23c636eb9b89de32f550f53a5954edc6473d93a456566eae292c70e8555aac9. 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/QZ5AB1984107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911145623716ebed7d9b17cbb25a88a59d2d500a720aaca0d734bd8418d8e7b4. 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/QZ5AB1984110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd0615b696d8a78d078c47a50da58a47f173f43df905eea9d4b5df6771d58c. 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/QZ5AB1984111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5424c2a82e76360e0746fc573d18317c4e47ba9f9f3a384f538baedc85324eb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ5AB1984112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92393915a96c35fbaeb808e89b4a803dbdff314aa1a7ef5a4cb7ba6aa5355ccb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5AB1984114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21bff45575b112fef97a9d5b6a2d9d8c2aa00079974849b5a8a8d20d08907aa. 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/QZ5AB1984115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf02ed99c26eb525aa7ef09cd15af937a8d51b8ae9a2c4cddfcae9a0b49f4b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZ5AB1984116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2778909aece2bbb3f53965b0e520291afe8c798180ccde1dd0b974a3c3aa6995. 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/QZ5AB1984119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eeadfc1151e7f0ebe4de299a0c1fa60cbaa6ec1a7f3db17526983a0de8c0003. 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/QZ5AB1984121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dce65b7fab59d703aa7d308a7c094bb79dd519145f7d96a2a03635f02c572ae. 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/QZ5AB1984125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78dd1db8c75f802d77d11181569db7439d1eee00c299df5316eb186dcb44ab8. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZ5AB1984127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6688ba00d86e7918f26a2720845b36d0342eb764d157f88e2bbd8c16ae88ae0d. 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/QZ5AB1984108.
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 0x0de1c8db2b3e1695d2546d63892f836c14dd799f72a1cb99ca5014cb3162ed77. 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/QZ5AB1984109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247317477eec3b31bc6555ddfc2a7e32c4148d226d70447cb9c4ac955c1c672a. 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/QZ5AB1984113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403730e56b9e63730215f289d7373490dd4e4ceb70430699fe61c4a7f0b743bf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZ5AB1984117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe451c46d1636d816f73dadf499963b2dd666e27e09fbdb3e36aa5981d163bf25. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZ5AB1984118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b867446a0eb4d2ccf1a82eb55a849e229092a809f284d13ae078d1b303430d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZ5AB1984120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc46b5975c8844a5c4667322dee8e7a55a0ede081914b13135aa44d90c43223. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ5AB1984122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20ba7ed7ae4b14b1b539cc7cd571b9e23cc3d617ea0cfc9913083f4902c1198. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZ5AB1984123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3103cc9ae9f039b347c8500abe47b54a220b498b56c49bd454a70b74d373a201. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZ5AB1984124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77acc7fdb9c167f2a43442ede99e309e94574fa3c0b11483c298223ce975dafe. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZ5AB1984126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b50ab2bc59a15d7382efa52f5c2d7d8704912945f15a30656d1b6b632c939de. 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/FR2X42060311.