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 0x5bc9e4bb6ae8eb19c83233f3503584de11185b1a891eb584e10cc04e7c8e0eba. 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/ccb0b860-6f2a-4d72-bbaf-69a33a343547.json and https://artists.proofprofile.net/proofs/artist/ccb0b860-6f2a-4d72-bbaf-69a33a343547.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 0x41d63dc1d2b0117ba51a0cf0ae57f7456195c800f8e6d0d051abe57d23dd5800. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:54Z), 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/GX3HH2188307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9faf57738c4e653f303e1878352e6a7222cd8c21bdfa81868f0f5d04462af. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/TCAHP2385605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb442bf66803cf5b07cc52522818d39e9b2c0f51acb32f0060bd60c339b076e. 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/TCAHP2385617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfee4a1b412f3ea85ba25b7507a657e6411f0fc87072ec0034c0998923fdb811. 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/TCAHP2385629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371db82a96e8494bb244f95449facc87d9af768bcfd7f546539e71634ef9506b. 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/TCAHP2385661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6c4e793c40b8b167f95d51122cc93173fa7ba25865a3406cf526450a1e66be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHP2385668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd8d7da5db52677efa84c564a0545689a09d6e67841316639d14ff2584b74de. 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/TCAHP2385693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d01bb45f81c5aced342a4353f4ff096ce27130c5e34f87bfdd0d1149784e85c. 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/TCAHP2385711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae59eb2f6523b3eacd7af3d8ed02435559b0e503a52ca0b0c204a0c763111ec. 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/TCAHP2385721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2ca78621107368d96c0143e4fc77ef64ca407d79036f650a36213505c12695. 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/TCAHP2385749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33172b19059b599fe250f05b237becd96868d7927a5fcf1344ce2d7307791745. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T15:30:12Z), 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/TCAHP2385601.
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 0xf7d00f0652b636d6bdf7fd8e3fcd230e24a8cfdbf51952407a33df6acd3ddb92. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAHP2385738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e1c68b0130e2788837924b71cc19c79b91ef58838db93f72abb800c5377305. 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/TCAHP2385744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be1a95d1370520d6c920e3a4a3fa4e4bc786eecb7a5cc313190bab66eb6fff. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIQ2404818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c3d8109e03d886c884c9f4d05f4df07d87265f880b3bbd698a397645998189. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAIR2404830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643ef8ad39922834e086baff89ef5588b720857bdc45d2daa9c25cfa7c62889b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAIQ2404840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055332a773e0493d0d14e806d699c6081a9fbadb866a8f396d512da2cbe675e. 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/TCAIQ2404844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78495309d5a9b4b28316eeacf52be978a0d56ba628ea8979cb1eb66bfdcfa887. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJD2413025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bae5a47e8e0df744c865acbdbe410099818d566e9173d83f57f25b8afb5ed4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJC2413046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ec9127a6902a1efdf36b3c2dc9635bc96a06ff40683ad948dace50c91fa49. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCAJC2413098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e4b2b793a359788d3ae2d01080216873d9fc8b9dd2f5da9b547cd3f2278907. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TCAJC2413108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78405e80a644d7dbcae48607b9f758008404c439c4f395ccfff9b492b70fc7ed. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJC2413116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005b3e29e7467afd8a41e8f3408a40065fa5c3e10e325f18ac0cea82858699e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJC2413128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcf41beaaf05eef3e97d13b0d5073967ceb5ae358f1f6fbbffea36f34f189f7. 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/TCAJD2413133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf7d7b8b6154e37e86e87f0d16d160a2772f228555b928c68675f1414b5ae8e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAJC2413236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e5af98d3d9600a46dde7f4c77a4953f8810ca3c48ead596a82b350693604a8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:44Z), 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/TCAJD2413249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634176d30450c4d5bcb53c2ed09426d82625c97229b47e3688f935b2d7701b0c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAJC2413266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca55f860dcc88d5fd434392dcc78748eed8f9be04bddee0e438a57630c6cddeb. 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/TCAJC2413273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7065719d6fc97eb5536eafbfaac1df2cc5f0cbc5181ba110e15daa4f4e87a18f. 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/TCAJC2413281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ea2924a486913ffc17d726de3f7c2c8acfb0608113f27543f9994d0a5ca47b. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:25:08Z), 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/TCAJC2413290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5316a024ffec5a0194cb4790fdb8b05b5f4de8d184f380bfcdecc83b614ff34c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJC2413298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e539aa6286e9b2158d83d8dd4602a74336811c89263a59ad32d283fdc0f0824. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:47Z), 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/FRX452501899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938bfd4168d09259b47f432181a464b04ab189f3d24b72cc73fc0ea64dd1f90e. 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/QZNJY2113292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58107d1a73420c61ee128638da1dbf00acf05189d6e7f853550e540137ae803b. 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/QT3EZ2405950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f851833b9cfcae56b3dedf016a8998a966e5eb278afc6414a4201583ba95a95. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GX4R52426582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9bde7dd89f19468abffe9a1c81289d460c2798f2a74420103bc5df099119f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GX4R52458278.