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 0xf8b6685c1394c57ea0d7611aa3e01969ffc78656a0cfad428dff4130ed1d83b4. 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/a62dbd3b-a72c-4346-afc4-2e6c030329e4.json and https://artists.proofprofile.net/proofs/artist/a62dbd3b-a72c-4346-afc4-2e6c030329e4.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 0x177205252a0d52bd1b43110e84c30e1d25aeb416489687ebd498fbab5b452927. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CBB7W2308093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8712b156c3186951ffd39ec7390643681082e283099c328167e0a16dfa398cd. 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/CBB7W2308706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efba3f1d1fdbf7c5e8130d299e8381f234db42d2dff5ff6d5d24943d12b64a6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2308707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28b9ba294aa95026f22a173369ba853e81b6a078fe6978697ffbc84dad9ca9. 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/CBB7W2308708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9631ea1a81034c882530d742b09deb7d7a1bc176193515907be24d382301a7a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CBB7W2308709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc553b5596d45f54b3edc56ddb7a08478c293ca9ae069750cbe1cb19ec95629. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2308710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d226234abdb985c33037a483de36670cbc384dff62620f945ef01fba943a96c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CBB7W2309040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ccd662414662de576a305fb209127107c05d134f4162c1db974847a8e991a5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6811ec79c103c00b4523af833efc83bbc26965367eb03a9255dcd1f8e86055. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CBB7W2309042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8684bf813ddc84e0ea8cd0ce80e89c2bb5f648767eefa9e3fb8b2376b4c144. 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/CBB7W2309043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c211358168bb25462df63d740f530aa56de2a1b978d65167bd8797c01fce3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396114546a1a8cea79a7de297ecbc6fe638818d3a64a04125413b69c7ccaaf48. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d7008fccf4253447959863389472b7dd2988cde4272fa212e77c8fe022b1b4. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/CBB7W2309247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c139613db48008c9a0364e67f44395ef64f7fc0431b182ad8bb06143ead7270. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/CBB7W2309248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f35f42cee87088c597eff2437f4a1a91b4b502c418df37362669e80823482. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/CBB7W2309249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99e2aa67aa52f57a24c7dd8526f85f6832f4a63a8ae6466d82d9c19fac6fbe8. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/CBB7W2309250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877b0fc78a1c2bd87e9433b20809dd6c8d965bc65b58adc4a14ee2a58a6db53b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d92c3ac1e76450f031e68227de5f25d7352bfb28e4c9ba9bdedfaabe93e7e5. 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/CBB7W2309190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975b817a551f18b148ac8518fe2f77ece1665db73ca23434a13bd45159b2cccc. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CBB7W2309191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96454b65fe90d505abfee1707bf715df14a52d51e4e3dde082db42b76371422c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb227574a314c9d3714aedee5062470d4d90a598293905c0d13ba501c5ffb7dd. 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/CBB7W2309193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc654b4e49b4e5b70ae3035f58b461cf722a8d4c463dbf7540d1aa119af5a3b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dcebb08466e8b26aa3544ee35fdf291838f667781600bd7cd36ed1ba453d28. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CBB7W2309195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78b1ac1aaac68f65fee2596991ac7bbc4a62f696d2a694c5a1dbd8b95cfceb6. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/CBB7W2309814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8226d4be15b5194e90493bfd4f846ce66895dfa595e24dff20f1400dcdafdb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CBB7W2309815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16683a1bb062249785b9b8a966367155787230883493594ad0515bcf01483026. 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/CBB7W2309816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899087b5377ca2e87d1b5e93a1b7434faab49b78d41b106883e193f92c5fac96. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CBB7W2309818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347ddfa4546b7dd7725c37bc7fbb262f947142f462ca18944deb0d4a351b672. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CBB7W2309819.