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 0x0e29c3f154754e95e7ef40a4e8326455ec7b8c02add30fdc507a3eb1b497661d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/432a7894-7e05-41a9-8a94-13ec0fe43250.json and https://artists.proofprofile.net/proofs/artist/432a7894-7e05-41a9-8a94-13ec0fe43250.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 0x50d8f1bb9bda5337b0f70fb291ce0bee3fbe616b20cd5738dafd797917d0c51a. 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/SE6SA2246706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be5e1b13920dfc5258a17a32a0c0dbd173678b14d5ffa18475fe360e265d229. 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/SE6SA2246707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b508c5ca1cb3799c47e49722e06a033bcd2f7397604557de5fdfcbe0fe34609. 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/SE6SA2246711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc354d825ff777d9487395b0a29d1bb67e3349809e427e1e4c22db3d5d8bafcf3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6SA2246713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6a8a831e372ef42d78dfc383d49f8cd8a4d242408ed7e43f1db4c001beb59. 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/SE6HN2289579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856a3052b96774a89c962011985e6c7c2efc0ca4222eeec40026e20ffcf78048. 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/SE6SA2246715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d429620b3c42ab51329b88babc5fdd3abb8bf7265360cb7efbcd9f1d7cc419. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZMEQ2423734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c59465bc1fd1e88b491f6a7989bda574ec2bfc3d77c511fb5552ddb8932da. 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/QZMEQ2423735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae4771964ef5847b415fcd31a3cc6c5d5a2ebb397862680602d755d1e7548ce. 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/QZFZ62439730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9ee4da93b89c0b72ab24e12c78463e5835bf31746694ab01b2da889cd81e85. 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/QZHNA2439420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fff67495ec744bf39b04556a9f0090c4765fdfa3c47888c15151e8341df4b5. 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/QZPLR2445718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50288a69d636d2cdbedc8fad844dbb2cc8961098e8d9c4ab9dbba5ec8155d3cb. 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/QZPLR2445721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0c4cb736c08401b22f3825cfc67ea228cdfecf774a0e40f3542f1361daf1a3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLR2445723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ed634545d4e8f7fb700860c5046bea623ba2a67cf3ab1e19d1374b909df793. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZPLR2445728.
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 0xf7c702905a534568df085049cf7cfc4a5e62626b790039b04f3be2023124f9b2. 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/QZMEQ2541527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60662dac961724b1d22bf7fc3876f9c75a86ff2b0562001454b424d31f36f14a. 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/QZK6N2524935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1ae79d24f333011b303f6458087608f68ff05916e0b3d1de3cbeffb9b7c7dc. 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/SE6SA2427714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957c5b1798b853ce831dc9ac2b547243b40bbad9031a091935218b0d025a7b53. 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/SE6QE2491326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dfd907b8362912938e8f74b46e05671ae15f1f43c618d351f4e2ff84e209d5. 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/SE6SA2427719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aad982418b15cb93951ff626fd0f3dcf1bd75f096e954cc52d53754ddbc482. 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/SE6SA2427723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4c63036c056125c4b67d5869da14600a20df987c296c6ce447b30ce3f80317. 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/SE5BU2581573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb2db539761c227733fc15be844b03ff390db65358dc64628b0b8188615a9d0. 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/SE5BU2539249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f83056170324b6faade10f5b15ac6e99d8ef2843824a410b59b0f5a5f863b5. 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/SE5BU2566241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186778065529a440f8e5485a68bc9f85caf2bd11360be14701fb2711a6343838. 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/SE5BU2581576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f87b7e2d3a234fb14fa01334744fb6c4e6bd3b469870cca94d4434a03428456. 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/SE5BU2581578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe666817fbb1ad8dbc5ecd9f46825cc6386ad51c6f3bc4d050a02ff526b5cb797. 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/SE5BU2581581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84805bb7fbfe37376e58ade280920bf770835a7982101d47ded9c1d3b10c932. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5BU2581575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0f279a92cb2549739f2cf07e82c89d6165feb2843303b3df9b61cd01030f9c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWFN2484915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca38abe9d2cb8cf586d3d653c72cee3e698865bcc747286cea808b6a9ef0ca9. 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/GBMA22439638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988a456188379511ef250e2154171daedae4dda30954a762e82b5ad80bc5b125. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5BU2538626.