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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637f5b22e9ff5af27857df55a4fcf82c4bf7b868f2e2af5d85492cbad8c8f804. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72be35f6-2404-4e45-809d-5ce90b35e274.json and https://artists.proofprofile.net/proofs/artist/72be35f6-2404-4e45-809d-5ce90b35e274.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af92cd5b0b87131f7aa4b87ebe1b10ec348191880effea83317ed7d32023f73. 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/TCAEZ2038787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64d4ab9454a277f2419747539e90732a4b6544d23ccbe4be8269a2b4ac1277. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/TCAFD2015321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6331bbb5e50091824b0c323025b9f19719328d9554257ac4d9797f22945b9115. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAFD2014977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeade9f322954f503a67507738708bf944d65e3c394195fe7c6e815ff248217c2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFD2014992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7533567b8d3810c179eb8f4d3f6e7e83fcab5fa3e2e9b855fb85894c054be2. 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/TCAFD2015025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888420f8af78b0e751e7378a3ecdab71e27ba4545a6abb8659848aea3d1f98c0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAFD2015065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0eeecbf57f6765592f16e63c367a2190c1bb7cd61f4ccf94aa3f3a3a4cf91c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:52Z), 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/TCAFX2160812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d600908b6b38281c7c11d5a64abb624d10c032a9387d36c445d68ab5d5eed94. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAGK2294854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676572ce671f35c8e2c2d0485c6f70d24dd62d40c914b4c05273c4ac63583e8. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/TCAHZ2435810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c6893b310b3bf8cfb05f0d116bb859d942707cb70c27f8de800583d29464b1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAIK2449824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2540347c5ad47bd00f32be6cd648c8a0a506828379a12eba50a688c6c55f51. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCAIK2475484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf676572ce671f35c8e2c2d0485c6f70d24dd62d40c914b4c05273c4ac63583e8. 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/TCAHZ2435810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b4399198e05e88f5a4246b49c155b74e338c7cd04b3f0f7be1f16901df9255. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/TCAIK2476154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d867668a8e800e805bcfc5e466594d292c4a43bf580b103adc91db861e2b0d. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/TCAIL2476234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db0717a387f4a1ced973d76e8a0ed39a15cc683d929d0a8efbb5d05803ccac6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIK2476364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f6a58454a58e5e112b1e11576f5f837d06042fc58886d04b9585c8f9071bc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:58Z), 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/TCAIL2476446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6555a9d490c996ab2792243ae06c7f503a5a0e37d9fc8635a59eaf706077d9. 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/TCAIL2476481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf4445aec790c83e5da93c9435be3248a602550b9f2f19c66682d6b46da1db. 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/TCAIL2476546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b12bdf12978895fbf6b6e7f15749401464aed9bd01b9941ff87fbff861c84c. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:07:59Z), 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/TCAIK2476568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02807d31d417f56689977749f0a0052194e1fa7a5e142a61eb511a3f503bfadd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIK2476586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857a0bbbf04fa9b7079b74fab044db88510060aa8fa417f1e89d20d1658f9dd2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCAHT2308899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a92993461ede9c63a6866fee8d5afb1cbc64811d21a9f712b1108847f824f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIL2476632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bdbcba265c78e978295e616d19627e9dd7c6ad9d3db5d8f3f8c48f5cf40017. 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/QT65Z2599843.