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 0x051feb6975d207e3ae4447547b58917cb0f515a6342f3aa77fca985e6bc32072. 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/ddd8dedd-7415-4e1b-b33b-6650ce724c61.json and https://artists.proofprofile.net/proofs/artist/ddd8dedd-7415-4e1b-b33b-6650ce724c61.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 0x5f94f2aaef5a1ea10133e40eab1899418e4cee136876685a8b682feec0f626e3. 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/ARUM72100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1648d7e4ccd301e2e3a80b32b3191f3aee2b64162e87f90041f1af75443fdbc8. 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/ARUM72100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a29807789435c2c31851e5bdf351e0b849b5a233edc223a33835d24dc38ae5f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNJY2113124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a892dc6ad50d61defdf82c8303ede526cbfd364286cb7d7e607706c67d750b. 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/QZGLS2268306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf517eea923fc1bdb1b6406ad34307fde9f5b8dfa58b950ff3db7401b8390592f. 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/QZHZ32232967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b75f3c1c97345d61aa748effc82c3c711cb1604f52c4d08e3f4bb44abcf9896. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZHZ42282137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416a7420d5337fe3e3682570d095ef08d004964c15d00d618a4aaf3da738c731. 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/QZNJV2263774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be637c7a1c42ada4f85eec8b1fcabf7c2f9652d2e87898d35b9e7f7d9ac39d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJY2208064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4167f79c39d52c887b5980be39e5d13902f2a541af599bfa6dd9ce056de2d3a. 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/US7VG2329316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e5ad41a32dd81a9ee4bf9eb487558c07cc7a2e79646d280f303a18f1a4d7e1. 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/QZW9M2310120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7382f8680d632432c9c8362bb404be49541914f11fd0c80fcff098bbfb9b1bf. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US7VG2404094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cc78cb4306c83cb7df308620a3f20132ae0326ea402e1f3330a146eba93959. 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/QZWDW2516652.
Cumbia ( Priti / No Tiene Sentido / Baile Inolvidable )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d236a4c888f731c5acb2b9f3fc0dae8ce2c2195519336be5c9f4aa28d24ea1a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTPX2587044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8fdea5fede6d06d389d5d5b470cd8d1a536e7f7e5cac7cab685cf851dfde04. 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/QZNJW2098471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c103f455dbcfc6e452a9b7683bacf0d75f6a5afb38e5eec9b5b84314248a7. 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/ARQ8R2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa9dff1637d796f8b041f5348cc06619e5902ab69b87614979209a31749f852. 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/QMBZ92247652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda2391f2fbc151c4124c0ae22d5ce20ecc463f602648658d29365e0e7a411f. 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/AR5UH2302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda2391f2fbc151c4124c0ae22d5ce20ecc463f602648658d29365e0e7a411f. 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/AR5UH2302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09938a184193acf9f32f5bf8dfda82aa6566520beb7e46e8b3e03463ef843524. 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/USCGJ2105871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a871eafc6eff96d41893c7d5a96d0d32d9bb747260a623e7d4d5035c9a7415a. 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/ARAE52400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580af1480cf3ba6b4c221879c8c6768ef9ddbfcbdef172c25a207208473356cf. 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/QM4TX2581515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcda2391f2fbc151c4124c0ae22d5ce20ecc463f602648658d29365e0e7a411f. 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/AR5UH2302301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd58bb5bc03a07b922ee8136597715ba732d1c17f22ef1097f3f39ccd95810. 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/ARF112500048.