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 0x33b064db5e72e485a52fd589afd84eb94f08ae2c66695ba1dd6bf585b38c914a. 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/b7dbf4dd-4572-43bc-b25a-26316fe01312.json and https://artists.proofprofile.net/proofs/artist/b7dbf4dd-4572-43bc-b25a-26316fe01312.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 0x11d76d6ad386abb04c0b4963f128a2b87f3d10b76946d4f92bfab6629ca282ff. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/SE3OW1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d62160d092d462b2a3b1e7c3c54bc1822e44b7eb762410dda78c8f91f76297. 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/SE3OW1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10b917bdeab736547afd865726ae14cdd3973a46186cc06276c02c61c5cddf3. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/SE3OW1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99cb170d25d49e7ce86009c7b1276d34bc2e23f5c2b595b1ab1bf81a230f6f8. 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/SE3OW1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a071224f5206a379b862b393007fec268f1ead2b8b21bcce025246310a307da. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SE3OW1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ce316b488190f91309ace8315f1096c88fe181cc966a4042a170f9e282da90. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAED1933467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8127ba12cee9249c105998c7d6bcf98e2f06def14eaf924c9f853cfeea0d5. 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/TCAEC1979665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0931ee8cf0f1c2030d09fd852eef334389a8fa151d55a07c17745086f9e54a1. 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/TCAED1933497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86878b69b0ecf1da383709483f3233a4b21d7c67c92e2c24f6623b978f13ba6e. 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/TCAED1933512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31333a5ee70a39574d8c253bcfd610da603b26d3aa0a712c1fbdddd2d553e645. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAED1933602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d744ab50222b5d77fcbb907b9bc88e6bda73ec75659085b488ca9f788c643. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USA2B1903188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cec659397dab20250963becd6f13f084adbe2bfec957be2360c21074cb74438. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SEWXY2000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff10f5cb353064c82f1da0bd8be3a815a16aba707dbb117bc793006dc5e7a36. 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/SEWXY2100904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e348fb48cffff69bfd63b8d3bd79a18efe1d540153184bcfc12553af8519962. 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/SEWXY2100905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1894597ffc4fd034369173bacc61620ecf0cf31b745de1de3693daff4ccaaa83. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEWXY2100901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e2e870ab09715aca841e2f51d12664e80b2efa31cd6d4d5046f628c7e56e3e. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SEWXY2100906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5edbf3b5010a8ce8b7807092b2830956f06924ed1f87b65a181607e4f51e80. 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/SEWXY2100907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7216374cd43e9144698399ca491c3839554c1b738a79083d972791af799170. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/SEWXY2100908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaffc0c58377a6042f392d140525b717b4815561e4d4b3ea0a6a3b4123af529. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/USA2B2317876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ff07aee3bd7599cb2c9f0437240a46df05847496d9dc210727f94c0ebaaa69. 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/USA2B2317877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852bd4a105489f1bdb37d85494795317beedb1ce787b56d1a5a64e6f69142c25. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USA2B2317879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6bd7ae05603c438cc19897447957acc1f84b8294ad9654c209583e5d43098c. 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/USA2B2317880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384d98d0bc811274b7bfcddddc3dcf594ed645564a33ab3c108cd3b5c051000. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USA2B2318918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8478bc70e42777c17884b574d0eb493e39eed23a209c56d38557befeee7005d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2B2318921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4619a07ffb12a7cfc139e1e1ecbeb3f5ee2545dc801aacc2fcfb2eca180e165e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2B2318611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce346abb039e99872871dcfe185d8fad0cd1822664dd2706f14ba8357981f2a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USA2B2318613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649913bdb492a8d12bf08f505e1c2e2805fdb8626782d5a350e998960371575. 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/USA2B2318614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c5e1f31be2c7b6e2b48251ce1b47d9b89151cee420038dbea264638516d9c6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USA2B2318615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6c0b64c5605ff4bedabfa85422616bac1afc0592106f09e00d824182bf795f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEWXY2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f495ef13123ba4ea208e4fb1f20b03698253c5542c785f498f1a81dfbf52f8. 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/SEWXY2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aff620289147e930b11a5b249fd10776c4e7482b28601a838d9f029a2706f7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USA2B2403881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6e149012276ac01301db8297bca5befa0d517db8a7d2a44b2ca19f08583390. 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/USA2B2404532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aff620289147e930b11a5b249fd10776c4e7482b28601a838d9f029a2706f7. 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/USA2B2403881.
Who by Fire - Live Tribute to Leonard Cohen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154cab897cda99352f5c25d857c3b138ce86fd4f85f3ba7b6b11b1deffdb899. 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/SEBGA2001071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a67e9d5765026ba9eb57dda015acdbd6f4b7cf164b5a0a201d05c66b400db. 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/SEBGA2001076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc108d37d707404161742e31d379735a4ef88e30d51b12045101689b833f874a. 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/SEBGA2001081.