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 0x49f876e07fa7401372ce198700790d854a3fec337f9ecfee0c2ea75c38e29739. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d6b897-d904-4fd7-b255-fac76a51a834.json and https://artists.proofprofile.net/proofs/artist/e1d6b897-d904-4fd7-b255-fac76a51a834.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 0x7582e260401bbc72f7924b5b71c50379a38fe1f9f4b1c40eec85e21cc8acb820. 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/UKXN21930798.
Palace of the Pessimist (Covid-19 Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb773c8c44c78b3f1fab3f52af64fbb76dc9d37b18c25223f3004781987237. 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/QMZNK1700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1119c4a4bb6db7f5cdaf316f06a8598ad26bd6f660a34734ddd43a55fa9de. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMZNK1700181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c10c930f6953f691d89455e562ae25e9cb654df119f8f4ef4e7637d8e96ca4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMZNK1700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb157fcf89678b1c3a58dce7a35dd8573a11b9dc41b73fc5d642cf02aeed5d7b. 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/QMZNK1700183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dec6191e2c65ea35eebe399413c73d043a64fc9256464b6f22b3b1e9237306c. 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/QMZNK1700184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8e83953226fa5c444f3dd9cb889d9ef469694ff93a3409425aeb44cba255bb. 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/QMZNK1700185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f525172d5cf7a047e80ca25afb63f121dba5bfe14b121517fdbbb97d35c864. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMZNK1700186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4caf8f0dc1eac1cf32469ae1256f43c97fa8483864e3d60337c95659f85a95a. 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/QMZNK1700187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a01191cec46c4974140e606c0f5550a9eee66db582c503e601fe880f01ef32c. 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/QMZNK1700188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72725f6956db597fca17e07c287937534e519f4c4232f6685accdb05d49880c3. 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/QMZNK1700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71381cef208964d7bff0f7c9ac7b0944d88e69607d6565d970d97d8adcd0fed1. 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/QZTAY2239075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edfb71ff6dab4f3eb30cb1e030723538cbcd897f69bf388a6db33574d7478b0. 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/QZTAY2239076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45b8b4929bd7af87b1df3cb67b91b2da3500cc7096d204ca496c7c927afe5e6. 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/QZTAY2239077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9474ba34039de793083aa364a03c09ab189874b2d64c963d3b83f48194cf27. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTAY2239078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cce483a083af0c142480cc99ddd19205e4310a4fb6c95f633497344ec2e217. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZTAY2239079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e4f30c443cf6866171578724a9ad63e5f453a5e0e5382d47bcdb095a9db5da. 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/QZTAY2239080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087a4c7086e8384bf686ffa7cced8f0054775551b93ea49de41dc7fafec2c041. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZTAY2239081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d466207e2cdb2fcd7e8cb6c0e299f01ea5a0524ab4dbb72d79a20dfd8b4551. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZTAY2239082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81deb47d4d24686f733dbb10ec3d8671f07c386822e17af848b470c7a914ed36. 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/QZTAY2239083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1939900f34092d095323bdab20bb31c1ff2309abaa34bfdfd7d79f539d41b89. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZHNB2188342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c875e5029d60bcefd98385d7a8cfb4e8b7f41909fc9a3927483236e4e096a2c. 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/QZK6G2308036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d31398968c027b907b938aa9e21378f26757e2bf6f4ee67ff34ef46346305. 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/QZTAZ2235199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aacdc85a8d543b0758e1de491adaeabd422e239fd8e90556ecdbc79cfc7da6. 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/QZK6Q2009143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c49cd3955259c89b5bef9a5a11cf3b95a3262384e949fdd996a0983e385185. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFZ42074185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79afbb53b786fcfc177477fae39626a5671df7de5a3050226858847ec7f4e2a2. 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/USCGH2044265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb928e08c1558a7da51c49bfa0f1dc44150fec4b5d86f687af5127a84b3fab8a8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USCGH2044266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c974899930955e155948690322a6fe965719706e13e79b036ddb8b1245227b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGH2044267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad06351714e38040df373c88ad7b59ce0a425cf35f853b67609e73b0de2ac5. 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/USCGH2044268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53328d5d974034e7da1e2fae293df759a411ba52430c642d5c88c6dd5f242c31. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCGH2044269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1febb8cce2f15332754be37b0cda8dba4718d105625115bc46b91777e9a93256. 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/USCGH2044270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedc737e6a6ec92e96a9660615c2da59f4f85ea69dae39ec814f42efc0902f3. 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/QZFZ72106796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c404642436175cdc3a99e35d99c60c708a32b0918ea924bdf777bcb136fce8. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZWFQ2307771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866663fbe49c18d395803d5bdde91d325843a02c15e63dc21c2d99c80ed0748. 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/QZFYY2484415.