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 0x765cd7c871fc2099ae6ccbacb4f6913e67128be48548582f559d1aa74c5f57ab. 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/7dceb9ea-6c87-4a42-ab7d-bda15e81b50e.json and https://artists.proofprofile.net/proofs/artist/7dceb9ea-6c87-4a42-ab7d-bda15e81b50e.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 0xb8e3b32b6032061b422f838e1f077d8d68ca0ee9da0e209ff5bca0ca0cd92574. 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/PLC062228316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28aa2a2aee669295492134758a246b1b4eff39c9263853bfc3fd082fca1c5f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:37Z), 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/PLC062228317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267ad835a5bb004f2b17f08c673841d3855bcdd09e80cf3a300abf007b02d41. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLC062228318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce6c4dfe6490ad6369795d8be25d37935304aa2555b69af01ad74962a9b1fe5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:16Z), 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/PLC062228319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2631a5140b5e86a188a5e78f7ae95ab5f254b3d00d27640908e3384a81e55f7. 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/PLC062228320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71256508a08f189f55fdebce04be566e16eb3e9b8ca151463d39ee3ccff0df8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLC062228322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74c70f9252e42b0680ae269dad544b6bd755cea587a4ed01d2ff833ba9ed936. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:54:59Z), 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/PLC062228323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7606db65113c1087afdfeea4176a643e589f18e325c0d5761e4a325190fc39a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/PLC062228326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c2fa4a09a586678ed6d8690a3385d6b84fdf853b9aa3b66939e92f6c3c6d96. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/PLC062228327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc888d3f4fae55757861697e48a0e85defa7de8f69e19b7ed2411e2353e0f4. 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/PLC062228330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aefba677f22d19255cd122f8b16ca560d7b573fabbe03b9f652dd8de43fe4f. 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/PLC062228331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e60f0c0a01b351d99c1275aef101a611c6c9964cf957402fbc7a59a6c8e038. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PLC062228332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb86ebed8f359b7c1982f62a04fb019421dac5c754928b65dd7860b200f44bb. 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/PLC062228333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b289fbb5ed5ec7c9fcb8da0884ea259d4cd002fbef2790f81ebae891b83524. 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/PLG571200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63364196dbeaba58c8b52c269ecaa3a472347efecd57c6c273d643df9a50883c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLG571200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c107eb7e86e7640726899ecc5b6d86021047a9a70687bf1f94e7f155dfb8a92. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:46:58Z), 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/PLG571200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac08fd9252e929814b1874a2dcb1bea02086913c58582a8d41715b92d4888407. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLG571200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6931c51c1fc02cc69a671b9532b65917eb718dbd22ddebaf4c915301a68849. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:01Z), 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/PLC062384824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc9f5ced74bc5afc2c8f352073736d57e463a2a5a770ed4650e1c698e559f6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLC062384826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339675ddaaf6d93b8c6a3294c9762e0da5689d2b3ad9c080a90ceeb2ef4280af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:11:36Z), 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/PLC062384827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ffa05bba7f49410d36e307a2772b0c0d0a2c913e8f60f4e42d55d82798de8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLC062384828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bdd53484a5da837436d09a79af7723802f3883309809d967051392e47c9322. 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/PLC062384829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18de391c95325cf99df37aee53defc7d332d9b89cc81ff9ab2d4f329212edd1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLC062384837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3241c6b08a5c631e0c77f502a925d3d77beefdbb8d44259e5887251ebf1b8966. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLC062384831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3fb8a712766783fe58f1414ce0c14affc714625a02a8c8e816bcbe088d30d0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLC062384832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7252d51bf91f750f86faf0ddec21cdb721426fd4f8f974aacb0535fb6569e291. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PLC062384834.