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 0x3de5deec7dfe271a3d76bf08fc59e87d14ae1b634a9443a5c91a239d97efc542. 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/78913bea-6f52-40e9-8efc-d596c8b44ab9.json and https://artists.proofprofile.net/proofs/artist/78913bea-6f52-40e9-8efc-d596c8b44ab9.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 0x46ee47967fe376619ac3cd2f8f75770bbff21ca6dd807499fde93458867448f3. 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/BRVR10700527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643bc67e0d9cb2e4a6c4c13981bdad01e2fd5b4976bf7d4f719aa7f1face8fa9. 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/BRVR10700528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35d037f9fac46376293488d54229a1e8a036608a3a9219bae91c4a1603e01b1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:32Z), 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/BRVR10700530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f01677878d4df6c9eaa23171de2cd53d4ffeaf311f7b4062de686bc8e289480. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:57Z), 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/BRVR10700533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6513f2f2e75d4d8c13f8ef9a3bc1dc5660f56c4223ad24073044e7ca3bb7d682. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRVR10700534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af42147e03456eced7d66fe5e0b688227bd72b1a1f3d5cc9d071defae213b1f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BRVR10900514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ca9f0afbcf2852aed5e5efa0746a215d1314b0561e583218a83089ab41bf4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRVR10900515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb392d274c781f9a67877ac92f90e967f85635d1af607a3383933706b1d0a66e5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRVR10900517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d43d95f154993998f7205a9268da7c05a761b40ac3d43ad13bf92ea64ec26. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRVR10900518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0b05aac901b59d0b90f799a42c473a59e9a3a4addbcdbc37cc75a47112e009. 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/BRVR10900519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0820e7bd1dcba90f4d038464593d4ff0e2eaaf78dd3267b9674a17c8ca82d7c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:02Z), 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/BRVR10900521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe8cc81b958c2507a3f1676b255aaa496fda436de2142a77455775ea6fe88a5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRVR11100731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a41389c5837c2d61522438fc181e25604b44b305b3d871760917b564c5e20. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/BRVR11100733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf889e1a474f36d1c6b1ea0132003c348a18c92521966f1c7fa0d6e732848e1d1. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:11:11Z), 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/BRVR11100736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900787fbbe61dbb5b21596a6d93f4fb1ea370eaf2047cfb2e9fcff20f1f5020. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2253115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14da9b50b66346f0ef1507bf2faa312eef17e3fcc86ebec01fff503448e5aa39. 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/CA5KR2253116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9df00226cc0a9c056e0ddb4dd4900c02c49bfbb257d3b1e7f98c11a78422c9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CA5KR2253117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6476087dbd30453af395507a6e905a55e25f0d9954a3247a24e4b660d6d0cc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2253118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb826ed1b7164cdb7d190b0c862c10fb7c524c158ae169c406ca6aff0e966f78. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CA5KR2253124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e47efb9d1ec52278e109a9eee8ce72d0adfff867d0dfdf2fdf5fac1c6b1a49d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CA5KR2253125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a3e8eb45b0b5d077b7568220fd2d9806553550031bbce41e8e53fe65310cde. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QM6N21515702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79cc29a83e3e57b90b2d2897ab768003b47bff7b2a1f2f2d1b517805a2a5d6b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:39Z), 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/CA5KR2253127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5bde82e86b28417d5823af6726fb095e04533d3ed35161684554724c69b51. 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/CA5KR2253128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe20ff34c9ec6d22623057cd3aca8d5a0b02d732641160f65e0b1978b2116076. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2253129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40628bbcb583287ba76ce779ebff4ae72688fd0b92a87f541f5d983a3f5d961. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:07Z), 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/CA5KR2253130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9506d5b40a3f6ec43c8826df329382eff842067ce4ec04ba71fc14f1fba27b91. 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/CA5KR2253133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41c2c7ca2d225cdcadddb8cb7f1b0566e654996e94faea7303298df8a308e5c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:30Z), 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/CA5KR2253134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2defa33e2487c687659959bcce7f08b0183807439fce661b507a8a77a864c80. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CA5KR2253135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43248cd7325d6170acf41e31c188ab53e90a7ddfa65d1dd0a8cc2962d9c985. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/CA5KR2253136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd45e01edece6248c07e430084c0094e9d62947a04f480f42cfd34ca811f55. 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/BR45X2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9931cdd65f44c6ce4b7ae023ba14f476b9e56b87ddfdb831b658e725fefb895e. 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/BR45X2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb4df2d635fe288839b427b3619c35f5c7f76b82dc81663411e9982601d9e3b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:54:08Z), 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/BR45X2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef43351841d5c966f852b3a5c9d880a8fd85794175b5cca763d0969858caa5c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR45X2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118486506cfe2dcc6ab6e28a10c4dc53d970a67e715c91071d62e837c7132ab. 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/BR45X2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58dacb3826bca7d7591d81746894e1772c761805dae96b1f3088c9c75985a37. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BR45X2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfcc38dbbbbea25a2a5543f9f0eaae6294c30e80e3f5d16e382e8d7dd508baf. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BR45X2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06055e125f45b9dc301b20734f010d922f6a36e7e7bd39ec39028c3ed4bafa5f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BR45X2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbfaa4385bb15c53e39c3b620289e2471208726b2240ab99e2fdd8492f4c96e. 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/QM6N21503277.