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 0x5490c8d153a4761b2ae244deb6bb90487ccf7649897bce98cf9ef78e68907769. 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/f6ade041-5c75-4efe-8009-4237b77a78b8.json and https://artists.proofprofile.net/proofs/artist/f6ade041-5c75-4efe-8009-4237b77a78b8.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 0xf91eec6ad23363d58dd046cab4a18e1cbb842f5b11ce848bff79d5d7c03458a1. 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/ARF109800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb89c55768fa95ea766e6e4443b802922da992f367b5497a96cc8b173440eeb9. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/ARF109902296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a652ce9eb6df4958e4f1e7e915c6e1d56cc30e4f4b6656fc9ac5605e7a5ef4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/ARF109902302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c9e30ac621ace171ae23a13047479f76bee64ecdda7cf2a192e23bc52c85d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ARF100100546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d68223946f94167a13c652edf28a14d2abb83272eebb98ceb511dda40fccfce. 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/ARF100100552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd04c9b00ced9c4b397ca28804dc818db5a24ed730a637aacd88f1387dc4a0d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ARF109902299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec98dfa838cd43138cc11bb466e57d2c23b92d5347b2cca72b5c92d8560cf0ea. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ARF109902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab1db41022fb75e1ed56be8a3a01a49ff7c0136a85235ca526958a3ba0ae0b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARF840400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef70457e05f96a41a882e2f252cbfe699334d2c0c5c7d5c24cebd424047d787a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ARF840400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7623e29e63333cd26a553d2f5d5bae0e400813d74d8d14ed7d0056234349a3c2. 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/ARF860600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238346737f745621da0f11f29f0f48d501fdcc1ff00c7ffdd4d32308d6fe0d6. 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/ARF860600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc222fb2ba43230c79a34221a120fc8af4eb22c09970a22634cbf2554b85f157. 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/ARF470900258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0177b107e995ccb813f4e7bf002564f16079b8c0a438fc6b7e8f7b19a178b957. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARF470900264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4637e1ed5bc982d6da6e1b7bc1877bfa421bd3bff8000971683e39345f44997d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/ARA821400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562b3eb97f4df51de3ae51b2694de35edd1b5866c9e6698613ab4025fbc5cdb6. 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/ARA821400797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1e9b081584298e88989800d882d9ca0fc13efa76f0997f5ca0dd71667b0ae3. 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/ARF471500091.
Sweet Home Buenos Aires (feat. Charly García)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8afaedeb96ebbbdc2aa0f8028a8fd200e239cc75cf0841bc2c9fdba5ce9e1. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ARIXB2104366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b404d24673d528a3a2f3bc81cc307a9fa4c140bb4340018508825b52122db. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ARIXB2105387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c541cd786e369d82ffcf30794c59b22392d1bf4057c1787f4c406990142b769. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARIXB2106860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8afaedeb96ebbbdc2aa0f8028a8fd200e239cc75cf0841bc2c9fdba5ce9e1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARIXB2104366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b404d24673d528a3a2f3bc81cc307a9fa4c140bb4340018508825b52122db. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/ARIXB2105387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8afaedeb96ebbbdc2aa0f8028a8fd200e239cc75cf0841bc2c9fdba5ce9e1. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/ARIXB2104366.
Rock de Mi Ciudad - Rockin' Buenos Aires
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91eec6ad23363d58dd046cab4a18e1cbb842f5b11ce848bff79d5d7c03458a1. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/ARF109800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf9c4ac1477b74c465986610dfd7074512bbeb4a05b5a00334f9c9eabf4f27f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARF100100550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c682be27aa48139b33f3f94b894d19fb441dc5370965ba6f2efcf7d704baba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARF100100555.
Cinco Décadas de Rock Argentino: Cuarta Década 1996 - 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec98dfa838cd43138cc11bb466e57d2c23b92d5347b2cca72b5c92d8560cf0ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARF109902301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92428676cd92b1a195cbeb50c7219b697a65f64500acc1d5eea7455de5c9ce. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA561432552.
Pelo Music Quince Años - Colección Rock Singles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549ee30d21e33487d2ad9999ff3e44278232e6bb7f863ac3ba32c5ed9b338f37. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ARF840400007.
Mucho mejor (con Javier Calamaro & Los Hermanos Flores)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8acd0df702984d68121d040b3ba15dd6bb91e32a5e6a04d2ef3d978984128d. 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/ES5010700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8772c2264293deba1e90bd73ddb0d1730d0db057599a48d9e41092fc00bfaa3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARFSB0600252.
Calamaro Querido!! Cantando Al Salmón Parte 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8772c2264293deba1e90bd73ddb0d1730d0db057599a48d9e41092fc00bfaa3. 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/ARFSB0600252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb62f40642b9730b59d5b1f58d61e3e3db9059cfe88be771bde5425d963f98. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ARO7U2300005.