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 0xaded2997b3621433396827b119df044cfc5b4bb7229f0c91243f7d80c551a49c. 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/f3c8e14c-65f0-4be6-a435-d476866d3ba2.json and https://artists.proofprofile.net/proofs/artist/f3c8e14c-65f0-4be6-a435-d476866d3ba2.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 0x3ac5f47d9aaa181d99d0c73ab13bb30c891cdee9bca0bac5ca48506ecc2f6a43. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/MX4971401634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecffac5b9536b86338b4d67d67f73fb2b9d6f52af419bd4be3c9a26bb7cb91f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/MX4971401644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae9a0b3c4115bb6b7d377051e70a183fa189a0f8cbe6800b811b3d847c3c6a1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/MX4971526533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440c101374164abcbc1ba84c96444efd46b6f06f1ce4b1a2b06640ccc0ba686d. 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/MX4971526539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4344e6be1b58e6c8abdcd1ccb92151f10131588c1bc22aa38b7d3cb7934c973. 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/MX4971526541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968a3e643717b42bd85ae424a802d78ac5895a9184e72e5caf5882f9f6f0f32a. 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/MX4971526543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac469b765c79393dbd8847c985f81f780b0d7c405b3b543de2c015ed4123be36. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCADE1748524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb10295aab465389f388a3c98840308b3815f0e2f61ad3588a0eea72a3eca448. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCADE1748530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5a22c0de49ed508a311b5c8008f43ffe6a03e16e6606d77e170e06603ef10. 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/TCADE1748541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ccbeebd138b4f5cb57b8494a8b295631cfaf62a70bce77aec9dcdd75d059c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCADE1748560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f6cfed7a80b79d848c8602ffb1e86bf452fe533bf40f40123bdb2f9e629342. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCADE1748562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a79cfbde398a38e19e9e6103d5b75c30e2f2673bc6b7b9fd75040a6a45539. 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/TCAEL1936753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f96873fe2869a161920e6fe596f828ddd688c858d87f5d1abbdc07d691ca57. 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/TCAEL1936770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb9cee80bfc286a60776ac8cb5a2966b0aae2b7ee24ff7b0f6dede6e3c88503. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAEL1936796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b4fad249a11cbde613026992aef22c60150e6b3dafc638a00f90fb91e4d6c8. 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/TCAFB2012839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cc5fac85493e7bdb1bc545f34bd69d12a4f8d8534147f475eab7f68a1ee686. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCAFB2012876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5560b32ca4672bb1599f4146666e43af80a0dd845a0509eb0ac431c952356330. 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/QM6DC2099434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0452e9b0f43f91f3cdc7d482bad647324b0d5af414ec96a6066524166f365a. 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/QM6DC2099438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea2206cbd228d91315bf1e05db332eee23ae4ccc190b9a6c3a3798c96bf8fd8. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QM6DC2099440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab38ed76c973d361dfac4b5ae4002da726796f5721aff40804aa8ed736eaf977. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAFT2143050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60421668a750dbb6ae6393d3078bff8eccb7051d1d3b8f51236a63b9fb68e632. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCAFT2143053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034317b42c4745b417e8849028d4aad9c63a8243cc468bf467a7c1bb8d658705. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAFT2143056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6c0ce8494dba77534e57c73ddcf85d97a402d26aa0a6a8f9e3f1ac1a31d883. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZDQH2150659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7a0ca318aac29ae81f5911ed4dd0e018b9b74e29a5028fe9d62da842966e7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZDQH2150667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e66763090b6dfe53fd44bbe794b3bab15fc6d2bbc6a7baf35aa47a091fcb588. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZDQH2150654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaf3507b5f0bf56675069e9900f93568a0262591e86dcdc000b87e654b291c1. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZDQH2150980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a309f667018c6926280948f88f62866579f4eec4baa8d05e6c4f03fcd244e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDQH2150984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea700211271d6da7dc8580dd8ef6c57b18476c04fa397b5fdc5b8b91daab259c. 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/QZDQH2150985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe550bf99e854fb5288f4c09a13cbc8ced8c33be4acd2573112f86e411ccc6643. 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/QZDQH2253149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdce0cc27690e56ba98e84b2eeb1936f314cad2f4eb8fad201cba645cfaf26ed. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCAHY2469986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41d88aecd74a5c7acbc4137fbe3f1689dd571dbe25d88696232fc0ae5c069dc. 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/TCAHY2469993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24319279891a2f3db8d4aedf5a35eff4d8f7dac13243d3394eb410414cea66d7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAIZ2467583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81503874f8752dd4bd3498a20dbecffbd0420e1d891a0196ac64d50ec7abad7a. 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/USJ3V1118558.