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 0x3da3ffd0108775236bee2680a74acef3e6cc9c7dc51372d35cfee7808f7b0ed7. 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/70f76daf-f885-492a-8095-df31f472f798.json and https://artists.proofprofile.net/proofs/artist/70f76daf-f885-492a-8095-df31f472f798.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 0x1fedd9eee3bb9980794df84852865bce1383df44ea9fe67337342a6d9cdd7f4c. 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/HKG732457603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bd0f6b8943ca91e46383507d699d6e6abb6496bcd96ac5eef318f891ef00ad. 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/HKD012523409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddf7c9995b8ee2c8664f934cd21c8f4f65d7754db6d1a7dcee6c0c1806f50b7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HKG732457581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b197fddf777870efaee14c477586bb70267a0f2dad693513dcef998a951a846. 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/HKG732428419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e0ed0756571fc1f0fc98284d48c851a5fb739abb1faa42ee62c53f8975afe. 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/HKG732428425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cbbdb8be8b0a42105c7faa4fdc09af8e17852132e31fe51b9313d4e186ebd7. 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/HKG732411880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165c89932ce943453846ebdaf393271c93d4e02c2dbd049107b5d2976390ea84. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HKG732406746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd678fe6f6cde8f9065f47301baf31ed9d0b88928b989e8389fd8b5a116b58c3. 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/HKG732406711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf4a3b9ee4ee59fd4de2ea908b2279c45ec2d0d32e9fed3da594c8eeb53937b. 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/TWDL72308321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163682646fe66e4a004bcd92aa2652f6c3194dde119ea77ed6642c88ba1e85d. 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/HKG731698057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a5b51ad45dffcc41f067760bf5e2e525ca1ed51033a10962bc3f3a0488d6dc. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HKG731682790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b67c71b105d4ae99da5c10410e17fecf757293ec18f1561bb187ad9b3b7b6e4. 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/HKG731682771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1f8f9bb4a943070f73114ce273acfc3f599338e882a3ad9d99baba14acc6a8. 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/HKG731682765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25abad5412dbfe9cdddeaa2b57663ee16c5c36e0ec17717299d537de6517a4aa. 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/HKG731679137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb25e51b2c26d4564e73d0229e44fe19f7988cb262cca8c9564a53d090bb2439. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKC992325836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc734fdc9e4c939f9079387f0aace6945df69a961f6f023848f47d2b351ff1f11. 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/HKG731676336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4364c364d1f45cce345ab8e9c3339d93d8166182cb79fee53791e2a2b79b409. 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/HKG731676330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760743a79f03c40b20cb57bbcf60ccb833310acc9348ac1346d0677dc5533832. 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/QZZ972340400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80aa919b2bd552f1f2b3a356bc645dca290ef2e301d39ef0753796dea12859d. 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/QZZ972339396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72750b63f8664843908946e5df27b71c0755e9e580599a050a55e94096381c10. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG731603078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466f2954dd4c69c132c9f6e186c76637c22e0ad1d757bd6495a0ddfe2ba69f73. 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/HKG732360953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0abc51ae99c49c4cb212cfccebad617f73ca2609e3263eb26467327034975f. 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/HKG732360949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020afa539c174e60fe16a414352c5ff030f17c3619b0961c7e79581830b075d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/HKG732360947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a60374d72576527d5bf8a8a949671681d3db5f84b5604e95ada23c1e23b0939. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKG732357445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc479c2e1075a997847818d3d5956e9834451495294606075968ad5facb686. 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/HKG732357462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc800c9e1fb38521de145e83bf4ee5a0acb93eb58044414106f20a0750f78c277. 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/HKG732357456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb525bc08c79f8961b69c0de83f8906f945536c2c413c99ff6943b75198208c2f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKG732331913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3798375ebfd1298dfdfe6ac70d1a62dbaceb9deea75afd3de5308a297ea1f5bf. 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/HKG732299383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5eacf9f0cbe1448b981c35de917ef60823fb843b9c825940c458015a2529f4. 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/HKG732299384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b98433152fba36aeffb03a7210044198e27f96be04894def14fa19cff9ef6ed. 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/HKG732291867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5faec5ae805c9f2ecdc99305396ea82849b9a0746bf67904a1ce2a92f283bd. 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/HKG732271429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfb4a0eb25f9e6766009e1d08306e07f289891ac6c63eec341697e206d13131. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762213650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ec008765cdb1764deb05a865e259e71bc79efead9c4052c7d8bf5cd2327001. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FRX762213651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ceef4614cdc17e59dc492a00364af3f203bbdacedce0e1bcfd0d6c0c5ddbb3. 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/HKG732265359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5678863c2416cd1386a6fc6fa85877f7ddd31bb180dbd6713178c493c8656181. 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/HKG732238131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5ac70dcf424fbf4279a2738b8bec4396ffd4886b7e04eb65d9a37ef1e8ee3f. 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/HKG732469500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec3dfb1cada0bd5248a2af968ad83d47c377d966bb31f2462a4c84913b6ee3a. 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/HKG732469508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd4f8e82c07cdb043ca201cd70badc281162f0b166b6f7be340b0f190598ffe. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG732469506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6bb49aa5029a1ecc145536149ea64a579b229422a13698938929c266292aa8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG731403612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f7df8d86147c7516398a7dbfd3f6a8b84897fccb3f3b0b4b910cb869784089. 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/HKG732486530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47692268963ca69f06d6a34fd6cdbea849187275a9fa07a80c1f32de23b81c81. 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/HKG732469490.