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 0x32141ac4675ec74d734d2b882cbdf483be37ed467e78502f149dc284194329c7. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e54a09c-8ac6-42f5-916e-da1073e2349b.json and https://artists.proofprofile.net/proofs/artist/4e54a09c-8ac6-42f5-916e-da1073e2349b.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 0x64b21261e65c6769442cd653216a770c6c057e09ef5153d0b64d12aa271a5fee. 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/USJSU0810472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda3eaaa31b460b095bfba793b69232bd5c717ac9d9708d1eee9f78328f47f3. 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/USJSU0810481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5fc8646eeb461fc30ee8e3e9bdd9319d15e06df8a41623a6451240ce6801c3. 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/USJSU0810274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6577ff5422d489f417744d41ffbbbc200e7963c34f40f3786c4423861eaf7e08. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/USJSU0810275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcdfd510d1237ad92db29c745c88672e023459ae31d7baa9daa9dd5166c1d13. 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/USJSU0810280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbb2ce64bcd11a0d6ffda8fe1af03d2eaff18a2e1918bdb6803799caf18e8c. 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/USJSU0810262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c966e2600a5155d68bc9857c8ed6b58650926746d260cdf80c0e58d3655593d. 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/USJSU0810263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370214bb90422f088e42fac7e3547fb28e7ba211cea1e019c8390ae0f163bce8. 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/USJSU0810264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e4f372e25b8d2d18445ab1f469b1ca1376c86c8ec60675e1dd4fbe13b817ab. 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/USJSU0810265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65183b097623b15ed41b122ac88427bb294130d001130d5c80f9dccb858105c. 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/USJSU0810267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6a41f50d54e817c29928f11d441e0f8abe6677be75ae225ecfa6b7afaf7420. Chain 2 (Bitcoin): anchored in block 957211 (2026-07-08T18:28:35Z), 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/USJSU0810270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244657ffc7ef5ea2e9bbd425d34557aacba862cc588dba7ef665f5c8f4a69743. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USJSU0810258.
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 0xc790d90e59ce981ec7dc42923941e897eae307475aac10653148ecc076de7b89. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USJSU0810259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e027222988c48d5c020fd706efecbdaec614947c8e808bb0fd271d46da6d03. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USJSU0810260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139b8b2a7b410cde4a820f7ef5051cabf453e449beb6242ced13e5b4f70846cf. 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/USJSU0810261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2abc82c075f55be891b1e5a834e56212bebf05db1ca2bb4f9684b3a87e2927. 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/USJSU0810266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ff917a072b1c19e225499f101c657d2a024a8fd01d5ae12bcca8fd7c3b9484. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USJSU0810268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0c25d097a32b6eeb78cf1517a80f68011b355a3fdb9c7055f117513cd145ed. 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/USJSU0810269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ac4cc339c35bf93f84ad7a6f7d6a1bf6b3904690703bef8e4da6c7f8cb661. 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/USJSU0810271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa2533ab13a026344d60f52af1569d8e855b5c21beae34386d15ae18528dfa3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USJSU0810272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1f4994bca8d50c37af1e28e247255887069d303952d1d58eb563a33d0230a7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USJSU0810273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916dcfe5476350708408e342b7a781db6c73448090973525a48ccc0a1942bbea. 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/USJSU0810084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3503870e203a5f7a5d448da853baadc5a817e42332f2e353c02b7a0bd9db2648. 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/USJSU0810086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f13e9070e4ebb2d205d373c41e76c4e936fa2cac4adf2b017f4f25a6f3338a. 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/USJSU0810089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c639442cb11c9a32fabe618f6933fa19f691a06bc9a0faf6b2e70beba3560. 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/USJSU0810094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93d117e1a027941dad29a01dc5a5c8dd7fb7564cbc1534c05ef9e219abd9ea9. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USJSU0810085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cd125f714fc0be6655ce4f66d8fb0358ea2f72b2f620a98a90eb714277225. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USJSU0810087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451948722a97c161f075e38cc4ca2732c3b4a2008e6bb530aedf6f56e5400d67. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USJSU0810091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a42ebf24f5ce0f2cb4e1647e002875fa2ba85e90148c196263be856c218eeb. 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/TCAEM1921223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310cb39114b295f22cb1a86fca75a498edd4a0ff525365d92d793b08f45e000e. 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/USJSU0810550.