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 0x38ef0b8aa624cb0fd62ae5d1426133f2f97f9fcc30216e2438e29da7f2e0eda8. 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/d314f944-bb33-4850-acef-87881e476f72.json and https://artists.proofprofile.net/proofs/artist/d314f944-bb33-4850-acef-87881e476f72.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 0x9a70dd6eed8032b775584dc75f0b5f68820e4297a4ef731a97b46a7d279ec6d0. 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/USUG10400553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94509b0a5aecae7b530c67d48b891448624414c2a578662bab41a26363597a37. 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/USUG10400554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe066b19cc33b25e6990b759ff9897a051c25b1371b320becdaf2222e81e8dd09. 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/USUG10400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f6b2b50f66664f81afca6c5c6b43bcd42eb6425c258ca60f324627cd687cb. 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/USUG10400556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab75a5f80da39fe6d5c49b316c38b9a42c3d9b2f522d6b3d75aea1bd85350aa. 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/USUG10400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b1de23d13cdfa348f0ae9adf4c78b07a95311e24e5ac103b5d176645a5106d. 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/USUG10400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323c1071e8a560c493d5dbb0e9d8e47096a3356e1bb699a38c10ffc641e64a67. 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/USUG10400559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b55cf66e2d728d81b5f35f872aa2fec1271f9db4185137f17a828b556373604. 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/USUG10400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbccf2c220a8b0290e02d9e228ca0fbce4762879bb877ae2af202bc56e5e3ec. 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/USUG10400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf7803583fbf77dd6df82031a2631b32b20c31db01e504b78d3af3ba596b1c6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUG10400563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f64cd96a52d7e4a0aa0f94027df43f0771084a4db8bcc7cc26b5490001977e. 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/USUG10400564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1f931b9de881dedf037d9a59fefd558b461fa7d25d5b3a71e4ad13f14e531. 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/USUG10400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b292c328396a38fcfc0643a2daa8cbff741be5e1d27318f29ea6e5b32b02adb. 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/USUG10400566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53284d43eedfbcbbf12e4879d6cc7785182dc53fc280db86a1d387669afb4e00. 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/USUG10400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0df08c6fa7e5c07307e42b30f7d887d8ffe19c464dd64372ac8d58bfbed58d. 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/USUG10400568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2e3c1e57e5951b43fda2cacb8f2e99f404a562cd42e0c0a8b732f47372eeae. 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/USHM80327851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d518dbe787ccc6c148c61e41a1fae9ea011d8e63e71acf11e00e935faa644. 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/USHM80327852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc4f6bf9fb72b517ba7dde63e0d4d453f356209cef96238536fd90a5b293076. 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/USHM80327853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca52c9e80bff1ee6a6e9857417f34e64a6ac157222b9c10c000c313552b2ca8. 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/USHM80327854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2012db66e28785653f958b35e6101ad5f9360f6560939904398ecbbb47fa8f1e. 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/USHM80327855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924a9509ed91e505f536a5a9a0f9536046756a042979f1fdccd3f46ea086ec5b. 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/USHM80327856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf499594644322452c8a75c19efe45096796ca0a9af2700b8b5bf02d06456f4. 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/USHM80327857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe344474457d1c85b2962103ffafc76281c4b88051ce106faa64ba3ed53f142b9. 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/USHM80327858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf88065a4e6cdedc6a6244d861d38523bcfdf7e3545b9ca7097f3b844c7593a3. 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/USAM10000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dcc1d30e47671bed6759a01fe77731dd89a27126f278570561e38f9e678515. 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/USAM10000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9259a5e74bd6261b2da5d94ea44b5ebee464a7fc4d7a6e829fe77a71ceb3ca5. 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/USHR10823978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e347f9cb530fa33b8677225bcf8a9cdbdaea452e0387ac94736d3dffe6d3a1. 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/USHR10823980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6531c976f8d337d71f81c32a9258b25b1b729e617ae0946772ba9db1e3454b06. 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/USHR10823981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f48e61a9530e005142d8a1a34c1f494b30c87043fedd3494d53b340b9150c. 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/USHR10823968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703c04c63f0f1f13868b54b19f7f073ab47c3ade4efe0493f73bae5245f5e483. 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/USHR10823969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42988fe1ebefe65b84c011a626b815b6862112ec8848f8a9b1b80a47b9158383. 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/USHR10823970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9542b1452bd6cc5d0c83b2055540ab7a4830f34edb05d5dac0eac8750217bab6. 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/USHR10823971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa80a55e0b91c13fd033d7158e46e3838b996cb8e079dd6464229d60232d441. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:19:53Z), 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/USHR10823972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93085886345d48346c31bd4e9aa1d3ac8c9f4f99e7a61099a4f950284a14587. 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/USHR10823973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf005cac8a710877657d8b002829c78655b9d8e0c28c29a3f066bfd291fbe819. 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/USHR10823974.
Jan Douwe Kroeske presents: 2 Meter Sessions #288 - Eleven
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16701054bddc18a4404c430c652e83337b3b17ee5cf0bc835b6e3d064ca080. 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/USCSG0996091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109619fda45d813e2cf486b72c2efdd592f3fac6d54d79c3a60644b207c9667f. 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/USUG10400562.