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 0xfd0d08ae7d829323b7d68b03617d68b6aacbacfc5cde7294dbf1d3c9ed49aa48. 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/71c2ffae-a515-445f-8d1a-ab0d08a9b3ce.json and https://artists.proofprofile.net/proofs/artist/71c2ffae-a515-445f-8d1a-ab0d08a9b3ce.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 0xa80137a2164cc8a1c5f54ad543549e0029eeef4c3939331dced9ba79add30180. 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/USANG2180778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa3b7fc2475691d6b2bee99773fad18bf0c40028ea1e3531251dfde38b9f73. 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/USANG2180780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83020f42d9d383f012143e4a47414d548950fd22c84b7022d625a893f1a9c8. 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/USANG2180782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03303337ddc02a3e5d8e0ac4927f0c8acb8c3d13e4f61ebb45f31d647ac9e01d. 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/ARG991024839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f43ad964dedd2ddacd2b8840342160216a094d52f113f1d4dcfbc8813b30e. 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/ARG991020092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3306402a8808e6a029c745559d5a13c4915bbf54f9c0af0c762290a39c00afbc. 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/ARG991022487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686f81df5103ff2fe6e2daffd4d3fe8dff45568279f2159e26300678be6d276. 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/ARG991022488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655be5727c31768b4500a1e6c377b791a134d334610e05c779330f9fb34f632b. 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/ARG991022489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b9393a9b684e8fd58622cc6c451463705729b68d547a38265298394407b362. 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/ARG991022491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fba172eebbe029394383deb605028e16a490515e7a586302bf4391d686cd9cb. 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/ARG991022493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa969bc587481fc40ad51a2a0870b6a1c0bc60a982b31444ddec8053e53833fd. 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/ARG991022494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8973d9548f4f708dad15ef8a5759ee8a50611551f3ee5b4a9ee22e372ae9017e. 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/ARG991021548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f8bbc3af04e362f5c97b5d8513887ca16e0e5e514f0f51a099546fc8ef300. 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/ARG991021549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcc106b519b88fb8dba30f28f50c6998cbb02c7ad3e5793b78565f7958e08b9. 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/ARG991021550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6e51299556ce7d875a3d6696bdf2405fef8c9c3dcb448ea3b9b518a8fa7220. 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/ARG991021552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2234e72cd4d7150585cad319893480e46342b1189a81c535429fe70863881. 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/ARG991021555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e371640fcc17d28662aadb29fc69559e2f34ef6e3264826520709b910b240c. 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/USA561154383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a42bbdd267e5e0a3488a49141ea39c43274ce004b65247c8c805b0af68a41d8. 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/USA561154384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bad1ea4294ced777c25db74e50497939341eb4a6e299c700f5b49dedf2555fd. 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/ARG991035963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7a19796434703ea82c13e819bebae1345e7ae9a0a1f9cf3214545856e64bfb. 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/US3DF2092947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cabfd331fd0f5bb0fd1226a0141335211138367738fd12fa6c4dde39ae3e423. 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/ARG991031746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a0e57536ac0698ec5d831f9adc984de442adec1d3e85061d0cbb27d9a5f1c4. 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/UYM122002472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149add52fc5790d4cac2b5294ea1e669e2914d31635417bdfa80a3676e97a58. 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/ARG991030430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99242941723162cd60700e6f3fc7d02c662f3b04c232a0316413101489247731. 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/USANG2033502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfded709bcad8be1210cc649ad1b64e5461526c3efb4827937bafadf0a58ea9. 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/USANG2013843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590bd507dfdf3633a97230cd601c1aeb48766ca82ffe20fe76b2ab914427542b. 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/ESA011954125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bafb5241fd85cbada374ecaf66fcf2efdd37ca9606fed97069f29486024709. 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/QMFMF1548630.