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 0x1e744d4dc61d53222bd9831249dc4a7c75690d6f25fd2d5fa78be4dcbdaa2256. 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/597840da-5928-4543-bb29-b67cd90da737.json and https://artists.proofprofile.net/proofs/artist/597840da-5928-4543-bb29-b67cd90da737.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 0xaa14a111142d697389db7e80a950e7c96ae963afb32db86d48d83f8ebdb56d76. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCACW1737109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302782d19979aeb56c3a560d34365130022413c29b9f7f031ceccd0fc2bc42b2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCADK1720858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3f22f22129c37d74afc537aa841531a0c95fdd5bbd31f1786fb2292f55fa35. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCADK1720859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa018c3c8791a40555e4c567ee2742bc8a9c777ffab72b1a489cad4cc8af65327. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCADK1720861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f93c45737245efa797a56cbb253a3bf5817db1ad318281e4c8a259ca161c9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAEP2036255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c61fec54187a35887e466c0712e080383feab54756f126eb5cb5ef9d577643. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAEP2036262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa04e1595a658197fa64c4052999a46aef9e8b2898e7706a09cb46f2c74eccf. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAEP2036264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a402e5af97226f8aeb51bef0e6ef56aa324f0b9527126f27d9c2264c82ee902. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHY2462029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11c0e62ada404de9e8d8a923ac78805389dc0c6f57621e8b66b07157e1df7b. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/TCAIM2423181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ca5543d6db7d9d0b10fac91421c043375e6d4b03285cf5d2dd1b8880cc7a7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAIL2423230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a9fddcf32f5555bc8943550268e84b4f511da29ad63fbcd9d00aa7742d349. 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/QM24S2501891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ed2ad644a74d897c2729b87ded03a2b5d5116a1d95251686ace438fa0c5bd. 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/QM24S2501890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf561dedd8161499b3c57a585266f0af5a2ac1f4cc57aa8a1fcd43d71d46aae11. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QM24S2500248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eebbb474ddb63246716dbe1f917355a26c06dd8bbd00decaf916a3b23ae2a13. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM24S2501889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba971f9fb4e5924063a22fee338a15c529d38ee515adc3fef3f04682663033a. 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/QM24S2501888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2065f558547809ecf4dadf1c7c8d13118f7decef058a47289358f82643b28e. 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/QM24S2501886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732ff09cc5589a1532302977aabdf2112b261f43b52294abd60abefd5eac2d95. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM24S2501885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb767f78cb1f5cdad5453df3a4b8b4184477492b6bd529ef0ae9019584ba04126. 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/QM24S2501884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ae32f319d5185f755c0f11379b0ff0695ed7c9b6fbe493f461245ba4f8198. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM24S2500247.