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 0xc6e973ddf952d7203a833d3a461b321295875161de8ca257fe287edcfebc90b4. 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/04abd376-b6ec-44b8-bab9-0013a52268a0.json and https://artists.proofprofile.net/proofs/artist/04abd376-b6ec-44b8-bab9-0013a52268a0.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 0x86fa272a0c63cfd09d3235ec984bb466e0836a4149b73cdb3972dd06e5609c45. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZDMQ1802501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8caaa475f15bced984d2538ed0b8a2d81966d01e98d0674910cac2da5fbbfe. 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/QZDMQ1902509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe816fbb872cf129ff2fc475dd0d3bd8e5db20f9ab8198cea77ae586fe4693298. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDMQ1902511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166add3c6562aafc14c751abcd0f229503263892598e166f40ef0e0bb0f6ec66. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDMQ1902512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d7554cee7b4e2729c727035e96d4bfc8d7011d9299045c7b16914c53212cc4. 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/QZDMQ2003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590df7b5bf6aea1f14cb3ad00c949c3c9deec026f197b9b0a2e4f57169a496cc. 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/QZDMQ1918801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc355edeb722b370e6c7b73752374afdb18325a2063c009597232dd3def102ca. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDMQ2003703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc3440f5b88ce28e3fd1220fae56edba8c2c626872bda4beebde36e91bfd74. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDMQ2003704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3fdcbf9ccfb317f1edd2442e2a3638c52213e04b9026a20a805b552d426fbf. 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/QZDMQ2003705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95d3a7d62614fb772864b3bc3a58ef4a3b1d1ac64a29e19dfb6bd17f8c9e82c. 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/QZDMQ2003706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f4ed7d9a956ae0e8ee8c1aa9d9f2fe732d44af0183dc6d7ef2818450f3fe29. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDMQ2003707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea840f76114b48027f0a4b0c5e0699ba840b19451e15c90145d1c7efedeeb7b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDMQ2003708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc570dcfb450cfab9cfe0108ccbb8f7a625f2df94b0ebd4c489667e3309a049b6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZDMQ1918802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04780b43d85ee488ce7f8bf3db172926deb2040813318ed5f7e56c1082bbcbf9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZDMQ2250251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272cfa09825c1ac55b87c718f0541a6518e03230630f21d260c7f062b0599822. 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/QZDMQ2250393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041ee8273778c5f97f00ca4cc70e58f412250673ab117ae2df6e19871979ce1d. 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/QZDMQ2350172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9765d0f3db5aeb66acc636617bbe193f272437082c4c456c2e9e8543a52f19e5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDMQ2350173.
Get A Hold Of Yourself / It Hurts Me So Much
Keep Me In Mind / Let Me Count the Reasons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af01038abe684648e9496431fbec8daa88ed1dbb2bc3ae765bd478b46514e1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZDMQ1902501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef4d61ddfc6cb8fabd8d8261419318ea181c3b42d0d6f9714a536a0239f132. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QZBKP1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28c9205febed875e359449b589d1bf46b99e957b5d6a440493a5c9d3e9960d6. 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/QMBZ91707061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e9b8633fe7cce65b649c54d206c78177cd843045cb74e2868efa9d892aaa3b. 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/US6680915504.
What's So Good About Saying Goodbye (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace221690a09cf528ab11c30d16d1f927c4c73627ad87bc3a655413a36b0b32. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US6680915505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882c3bc33fb15b7def9dd00264472b8b8f29d8a6fa1be5ad420df3b0d5c75fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US6680915356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a997141fdcd999cc2fbe6e2511477c00caeaca4c832ee0c7aad5e70a98bc5. 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/US6680915357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18ff5f6c4bd6ec74735acd5b14c4b984c440c221faf7cdde55637fa430eb658. 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/QZDMQ2030104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafac8559c237e998ed14eeee61d03a918d279b926221768bde1ce92aba0165b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX1753184.