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 0x1ed7c62993fe1e3eed91e2601027ea3644c6a6d0cde55276a8ee067704cea117. 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/4f9c9bc3-c98a-4c40-9b44-d5605d701046.json and https://artists.proofprofile.net/proofs/artist/4f9c9bc3-c98a-4c40-9b44-d5605d701046.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 0x8fa01b95f4fedae213d79f2af2a664a7c6344485f93f9137d1e1bd8a92b1a036. 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/ARG101615924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd5316e8bb5b93e161d725179fcf070dfdd232bbe6a91305aa8f16a276dcb6a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ARG101615927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ee5752d30d981c1cd4ad0d9da1711cb267c0ab170c107c847e8608327fbbce. 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/ARG101615934.
La Radio Esta Tocando tu canción / Déjame intentar / Mía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190276ce51d3b5407767f51c626be8035bda39c0576a3841de8e37714e3e713a. 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/ARG101615935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a06858b09762826a1eb3e974453dc59d6ed33fd17837055d68bcd0077f956e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/AR8L72000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9501e2d4cd7e4a79e29a04a6c1d8ffb024c6332f7acb3e553321dc9753fe59de. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZHZ42072811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4722fada1ce9fb4246fb5abca054e207529b91b005e680bc74524314c8b2f9eb. 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/QZHZ42072815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c41e0168e25407efe1e590a876315dc3d7798e11377e0eb3c491554d736d61a. 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/QZNJV2093588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe570e906f3768dc1b0683f9c726dcb2e6c4eddc07fbf59cf22f72f28077e2f. 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/QZGLM2235742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21144b849b45f02213d41caa7f7c80a749d5039adc3502a108cd9b99e528d19b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJW2212295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0c62e074de5bce8865836e9c16ecc98366192aa10e9e53083105acad5d99a5. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNJZ2384140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fb1f63d5af44f177fed165e251fb628a8844c4aca6cff80562ddd6d7456728. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTVM2483647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f487e05ada62ab9c34a3e93243c348dbfc0a778076a425a21c04ece0240d26. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZW9L2483322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea69e2c5c6e1e8b85cafb6071e0d8bab223b265003ae499be5e9e65295728c. 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/QZGLS2542532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7302d1b9f3e684158bf9bddb4e9de4a73d2b2e03e00df268459423162040b0. 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/QZGLS2541891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b83b1efbf5c2ff42173dd76f16132f53d5253c3979eefd1fb5a5ccac5dbea77. 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/QZNJV2551359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4624787b5871658da6617c63f2a0bdb754135e236b40ee5bdc568cd5f90f7dca. 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/QZNJZ2579717.