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 0x9f5f58a968cd7a49ab0a9b08defa615349db77befecb6f0d3623e5600e959cb2. 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/3256cee2-b4d7-47f4-a10b-6a00a88475f2.json and https://artists.proofprofile.net/proofs/artist/3256cee2-b4d7-47f4-a10b-6a00a88475f2.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 0x468fc4ab987bd7755df02b8e4249d005eb3290cce3341c84dfbdeff9834b71cc. 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/JPG102401268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081fa3b8ee38bb63f19047b9f81cefc7b5a46b179d744e0a4019de3d862e58b7. 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/JPG102401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc45588b3d541b1ff8ce9d0e93821087d0b1163e2e2b7f1b8dba15afce08bbc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPG102401270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c9f7d3fb22ba03dbcacf5145bb3513e502ec2e29b487596ebb7b8a3485a88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPG102400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74695d5fa12482de0f4cd20540ff45114e127a1910cb2b84a5f82879ad04a638. 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/JPG102400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d1737ceb40d02fc21bf19ecf784a11a9f3d4b4228a2e1c2c676e555d71b54. 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/JPG102401271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173c3ab8272619a850e8d910b79bf21cbf1e2a412e8a2020864b1a6384ebfd32. 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/JPG102401272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ebbe9c09f3695c0bd787315c58f91c701ccff2ef34054408dd49cc8b57f438. 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/JPG102401273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed85125a35a23e714bd8959ae1fb43d2a23bced604cfca4541edb6dadeae72a4. 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/JPG102401274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c89296613e983ffe9aea68ac48103c79a07a6804b694ee0bf3c6a28bfbf24e. 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/JPG102401275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74695d5fa12482de0f4cd20540ff45114e127a1910cb2b84a5f82879ad04a638. 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/JPG102400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9c9f7d3fb22ba03dbcacf5145bb3513e502ec2e29b487596ebb7b8a3485a88. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPG102400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07782da4251bfcdcfc7e16cec781f0a9ae7e3d872c7531dbe3a55342ef6ff7d. 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/JPG102301203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a322a1a4ec2de59fe28b0d89f8c0f165b48bdf89278ab1d79a2248a8b77d1d. 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/JPG102301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c850fcac26e98baecda69cd8776694a7cd399c02e1e1d9790cfb29ea1d8b8. 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/JPG102300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e245079e5faaf22f893fe8068a60b11b134803f0bad2150df0bd8744fffed57. 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/JPG102201261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef5e692a8f70f19aaf5cd5f44a400ebc204713d2908bdf9f7e78ec19ee1cc82. 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/JPG102201098.