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 0x3efda8175fd420e359d471a24a277942fb3b3cb9c699fbf2c89837a03d97844a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/668820d1-0dac-4660-806f-ed98e47b0f09.json and https://artists.proofprofile.net/proofs/artist/668820d1-0dac-4660-806f-ed98e47b0f09.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 0x24fc0d592b04195531b2bab555700bacd85f3db3da5ece238af2908a85a774bd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDY42003447.
Johannes Brahms: Six Pieces for Piano, Op. 118: No. 2, Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6da299bfd3aa954855a3e91e4a9bd920a90af2b7210937033aeb8678963a71c. 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/USL4Q2008562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3db428dae5d06e8d95c0e83f38d176525881c24f5e177f47427b041e606880. 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/USL4Q2008566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d049335b9aa519632c7253931c9165aa03a1e2ec8ac704bebfb81e0d2d11f2. 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/USL4Q2008574.
O Come, O Come, Emmanuel (Arr. Stephen Weber)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26cab709dbd9f2df7b1dcdfac6ade5989c380ad381bfe2b7b09a6cc2b968680. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72116189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae78baaa37d8958f7b2acc0995ac87f061b5ab071fd03cd82a016d839673c43. 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/AU3SE2100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c468de0548d7d8005b9896ed74c58ea500005e7700ee2a2090987be7f5a9f3a. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:16Z), 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/QZES72177803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912ca068678ee05a18371961747b3bfcce6b6e9f3800a41db1a1bb82a2c00b54. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKR6V2114757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a580abe0f0123eeceb06a5aa9e83978eccc8a0a8b3a0ba055b048188efd1b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UK2FD2100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092819a2c973c6d784a9497c4f9405db8d727cd6290f10076ec299f5abe9be07. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUMEV2219393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb37667003a27dba0a8d3e28afa9ce977a4459b062938074674c0519b38b78f. 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/GBRKQ2261515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c39af6fd671c617b0f222d0397078db497917ceb5d334211ec2bd46df543f4. 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/AUMEV2253166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d427ade4ea42e335e0e033dc6e2a78ca9b7af1d2eef639a058f761d0c099d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTRX2239100.
French Noël: Quelle est cette odeur agréable?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc859b56261206fe1d32c503c4cd23391afab0cd583067f57531c62a66074cf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4WT2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09f45c17babaee14a1f8781496dfdaee535abf07aa735fd1fdfc3b30a802761. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZES62441681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6813d104de486b0d95df589d659e0c72795362a437118d817e95ad16983bf8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWY2444611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb0a3397d39c80923426050d14b4489c6a7afb28ebcc0cd5b8c63c3266e78e7. 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/QZHN82522347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc8dc28a050871391a5543e541e0273b699a84cba2e6e196b5f587808cd3e36. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZZ7S2400697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1582027c1a79e7a0fb2df613fd295f66f437ed3bff1e2f5e88ffcd2c8a5d53. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6J2501167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4158e14dd684692094e1151665b8d15facd0ba9bedcb2b46d0fcb84c6db0698e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBB2588246.
Aemeralds presents: Library Aesthetics, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecc1e7fe5bfc595f215298824b3d7ef65a849774eeba633a4eb1ee0fd588940. 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/QMDA62230559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d427ade4ea42e335e0e033dc6e2a78ca9b7af1d2eef639a058f761d0c099d6. 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/QZTRX2239100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24b0d4e51971d0608b74e8e6ae76c323ccd4da8c013f9e4692b0e6ebfbce666. 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/AU3SE2301480.