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 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 0x3739cbf6f0a080c4e6729caab2c25a097938753151897249f805a3b6cd8ca772. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a21330c-e3f5-4bea-a2fb-846cc1bd16fe.json and https://artists.proofprofile.net/proofs/artist/4a21330c-e3f5-4bea-a2fb-846cc1bd16fe.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 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 0xdcb8a8357c754c6e815bc6ce6d1059f89a92a695535cb30d55abf9f58a11fb05. 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/QZMEQ2421095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127698e948b0ada51a8c9ad01c5d876b2a235199c9299c8767b79accd7b5d3a6. 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/QZMEQ2421097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36e8c83a28926aa416d78acbf4b457f912d5bc946280f8c0c4e08915b448f92. 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/QZPLR2471494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257bdee12ebcbfa113391ef8464e9d0b38b32a92fd1b8ad6708d275104ec4239. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIP2444405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7bb62f34c7368e737ff7582af83c0406ead2cff0ca037cf47cebfcc3b0e0a0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZMHL2493750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4055a329bbb636f34f43c2c83bde4265ed03f4ef41404eb32c86fbdbc9e02a. 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/QM42K2424851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7291f0b12726053499679b994b852c5dfbdc99e0b48f3895148fa23dd9269d71. 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/QZMHL2403277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a85e646c6861e73d736bf6b227dba8fb2057fb535836d296b6ac1b44725f99. 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/QZMHL2425629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee526a4e7f0e9327551dd4286ddd1b548e54243fcd76524c233cd1e4dc60a6a4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMHK2487423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25939760c084a3cb804a848a595c5764b5c314c42e3ded8ab1bca7bdfe97e76. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZS662436485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4c3b0e1a4c46e01c76b4c5b8826101ecbf96a56493dd51030b7d63aedd358. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZMHL2418056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7af38c2e41200190ae66c8b777278cb54928c144e5d0914dac8c1768511ba7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMHK2400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73b494a8a7a46e533919419978c7a4573b887e58bda5f3b1fc37b7ba57f4fb4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIQ2409928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea1380846bf0bba729fc0ea96301b8f32beaf161c2e12f04ab57b31d10de08f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMBZ92461100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ad68d20e54b1fc94b4ea8d13b8806cea6a80e30ece1523cc5f2c2c03a08dd. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZNWU2408971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927b018dfcc374be49e7c5fa418f87fbc3bae15e04a7d4a4d33bc4c0f2ab7234. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAIS2494782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2179f1c541c7b1a3af53cc35f2d1d495701eb64195fd5936bfebfb2290e0e2a. 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/TCAIT2447142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bc0ab93e4be679e8fa940f234c707c55df23e56d77b0ad8fd92cd89574c862. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAIX2461673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c6178e9a218e497cd04a3bc2bcc2be458b34a38c06a47e3e59b010d03ab612. 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/TCAIY2456734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb67f78838da1e814f07445a5f7e9afde7093d23e2c95c139e8659a0e34aea9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAJD2418232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8631314d475147d19c66020e8f9f461b5f4abcf79f0b8f4101a5ed4090aea63. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAJD2418245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594ed5e85a87bd6acca1211554a8673cd30423535beaa05949e64e2bea511d57. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJE2549995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515188375c072b8506090c310b946473ec22650b4df719eaa64730b980456c2. 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/TCAJF2554249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22a4b9e8cd8385ba00e3d9ca731ebf32ee1ac1817a27f8ab1925939f675de62. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAJF2554269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a947577a4909ed0149c49a4f12ba19e6f8d07a20723707872d59c1d7478b363. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAJF2554279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21187c694338faf3be59cab75c4f27db224be9ce68d00243103fdb12cc02002c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJF2554287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e98f80d7819d9aab0f6525266e033345362b81530d4663a45362e1040e23de9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJM2568370.
One Week She Love Me One Week She Hate Me Both Weeks I Got Paid.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba392b00b054b2cb750194941afbb6ec8f3234bcab54d20519a2a6b196fdb6f4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJU2551271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcea21497484d3f12d0efef4ef6db8b7e9902bbe5a63ceec7e35eafca4785e21. 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/QZWFS2452382.