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 0x01f9e236a9ff2d7ce8cb5ea38a3028d6588235d510c3269fa8cfe855f12b7531. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d79cdd30-5f1b-488a-a90e-3434051edc6f.json and https://artists.proofprofile.net/proofs/artist/d79cdd30-5f1b-488a-a90e-3434051edc6f.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 0x0c84667c49f4272c195a2297d041bd6ff1439e0f5214aad7b8cad5243352414e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4Q0816967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ef31de9af0aafe7f6701dafc7b6cb622e4a8d377d53db769a27795f0097ccf. 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/USL4Q0816972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ae35b08b37a0574a0c0498debb9684594c27afce18c3ffef47bd3d6d187dd7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USL4Q0816977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5a6ea026acbc3ec3097ab1e31df144cdd0f64422ec21cc44ef8283eda07c8e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4Q0816978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe900a7eef6def63017fbea72e4b8eec590c31d20915c9f3f6b517b340c1f4598. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMEU31503599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa44c07fca5a6c8164da791b57858a04559c90313093ec971a20f6d68bb101. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMEU31503614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe513a0fd7f1bf41ca48968f1823d3dc56db6e8c853cfed2dba124b5f4cfbbe1a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMEU31503615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704e5611199c63315ca9683417e7b7faaddca75c71ea0d4beb9d95728b754e21. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QMEU31503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a959c7b465c4824bcfab9503114bf9a2376e67c210fc928ae206a008320d1d. 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/QMEU31503603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35d990e5300c9062f8bef6b68add7dced37058e5e4b4bfba9d98ac352c0a344. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMEU31503624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024306afa5a24e651c139d7ce8ee22fcdfc75e0f0a5e5c98c90530abab4ed718. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USHM20885771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae4a55f207f04817a28f9f74c619f895bfb1e2110ebefd6de14583d4461b6a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM20885773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21688bfe20cdb7437ea68f89f7229a3fc0af0003adc9e0e6b763cbe2096563. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM20885774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc8e2a9ae5af54198e0236a749cede5a84c4caf7b2b802c56dca95b85faa55f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM20885777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99587aff5c0c8942af68b425286232cbccb6751dd8e4f7ffc540e29fd8c51c3d. 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/USHM20885792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7508be676c83a0a4254c1dd39a2118185ff6b5e20dcbf8fdb69496fb2e1d4b6d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM20885796.
Lionheart Sounds: Troddin' East - California Roots Family
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb46983755c0ed25b8cffc651c477c6423537508aaa23617717b61122bb14ca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USHM91045355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37aa694a8e50c9f99d4d9f6bd4b812f892cff42779fa77073b73c759d251751. 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/USHM90714360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd171d8ba940bed6be0a2419c7eec7071fdffaaa786f0b6aa0a68e446e3937e34. 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/TCAEL1959169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6a4fe0892aa9142dae0dfa592a793230992cb575f99aace9b0ccf8f5b328fa. 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/TCAEL1959210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0e18d77d2dadc9fec1fad48f443fef3bc6220260c1653d58268fa517abbc90. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEL1959230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc09a474aaa8659bf2541fbf995d0415af92cb882bc37af669ad9189ac045fa. 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/TCAEL1959239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae44b223d10233f5651320ee6255ed640eae82714a83641ca09200965993ed8c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAEL1959264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec07dd12053960884ecc39bd08c2e999c76cef53be1b7a4971aec72207e8df. 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/TCAEL1959281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942192e909fa70b8d9a9679fd71452a1f633a76a999036effed78627bcf00b8d. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAEL1959285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92ea415568b34f4e4bab0fd8031bc671d5de23cbfdaf3f20b4daca88716279e. 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/TCAEL1959305.