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 0x4ad613566dd0add97c5135dc1d0de1c1f1a15225a16197e8a462df9b7aca451f. 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/8a7699b3-d89d-4d3b-818f-2048a465b6e7.json and https://artists.proofprofile.net/proofs/artist/8a7699b3-d89d-4d3b-818f-2048a465b6e7.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 0x4ad7bbfd775d9e44ac9c5f217e124e45979c9a78fd227a6b50557cdfd4d444ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5120400832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd87bee10ed57ce35abec729076825edc4309e21315118656c345f18a96aff2. 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/ES5120400833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472405f5c1e8060b21ab694753cbc570c53ef20d90e49b14d7da2301d4503112. 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/ES5120400834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665f9b5b6099dc970923f8b681b2c351679065cbc30c1f2166ac395b570ab96. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES5120400763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2e02fbdee55443dd73b604e728def040ad0909718bbe4428706b6029ba767. 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/ES5120400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3443f3d4a935663652af9d97e6a49b6be45c2dc2c413a90d433afef952f8318c. 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/ES5120400836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d27a015f033d7a9155ffbc7c046b8b52d489c8fd7e1cf542a1ce365e92452ff. 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/ES5120400837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c61c7caf830779c1b0a8ee0c91c511d33347aa6c0f49f399ea9455c7cad4b. 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/ES5120400838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e9236baf74a10de85a45ad460007da2d5792c74ef3988e905be0677a510caa. 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/ES5120400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55ad7bacb9fa2e22cad2b5e52b95a36b72a94c247efbbf71d11dd7f589eccf2. 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/ES5120400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db294af5ece3e595e05190e42e8eaef7cb4ea6124f627bab94578da933a04f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:24:13Z), 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/FR2X41700657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50aa176c84dd7071cfa6cf98a236722bd0aba5749c5000bad346f32b0dbee80. 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/FR2X41751632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18498657774df5304d7f64fd51fb76cee8f0d8be970c0301b3a65fb08f7a601. 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/FR2X41751633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d22985616af3d7f9b96d7879da69284292b789354ece208496df1845d44ecf. 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/FR2X41751634.
Bulería de la Raza Vieja - Bulería No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae6cf34fa73110afd03c8b3e699072594e84be1a9df8cd119cca9f533e67ec5. 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/FR2X41751638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55894d3f7689230f3994261500602ebd144d8947f96f8895a11147d1b0c03d2. 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/FR2X41751642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b56582a9fbe669dde0ba06f9426306e3da7972aa076da89156d47ba858fca2. 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/FR2X41751654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c030971f72100b72fe3eedf90b58cd7a5746fdc465b15f5de9054d172c72364. 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/FR2X41751655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2222733f305cb20343db8faf1b605a52f2347b634ab3153de014fd14c6920f. 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/FR2X41751662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cba0a7d238de5968e3b76b8418cbfe686684acf90c4e78d7e7595b790d2d4f. 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/FR2X41745309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f80eb55b3b2a3a5147feebb88412e82b3c26dc604ef54ced1ac8c66e3f78ac. 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/FR2X41745310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d749ad9810a6ef6dae96683649a724b87b7ec476b1ad31cb257ee7cdd719156. 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/FR2X41745311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4a9b150b3054ddf18408df15b9acd0c1ffc583f70152622ebcbe47c936d641. 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/FR2X41745312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3a357dd5baa1a9b509772abf9ffa31f23c41a6db93a882e1ea75551389872. 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/FR2X41745313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7ea653b2c618d365f972679fbe2b7d12dc8b9636f6de6e7684c30e46656154. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:37Z), 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/FR2X41745314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46abe7bae4fba94571b287a184b48be7369486f28e4dac67e7900a49684eddfb. 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/FR2X41745315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d00e45f411e087f4db072b056a7d4640be95970fcaf20ed56f50d94b6eb60. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR2X41745316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad222e932a540fbe92fa03b359550b9149da95f2457c44893ae6a654c3925f6. 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/FR2X41745317.