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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6e17a36212de17af291c1c07675dfd97feddbc76f1849403bd80644caec56e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/222b2149-b1e4-4d0b-b0c2-90ce46b570e4.json and https://artists.proofprofile.net/proofs/artist/222b2149-b1e4-4d0b-b0c2-90ce46b570e4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc8ed285382f96f9cacd90d63c54a80a2ce5004e27ef713d91bf3e1562c415e. 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/GBMJG2324572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb3f3ef1fa13de9d92092f38dd353601166c9b3442b5eddd678f0c0f18e6da6. 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/GBMJG2324573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988e8ff2113eff1e3553a42c25667791cbbd248e4ec420db0dbdb3770548ccab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBMJG2324574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cb6eed670757042f0b118b25b5d63167b115d2992d75e31b086ddde7c1ca73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBMJG2324575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea6b4cf5cab6b31859982f0233c8788c7f9cab455b1410f590734b379e1fdd0. 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/GBMJG2324576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d38a0c0819fd8e9848a43cb21195b2eb72b2e015a7f4ec6fc6e74924119f8e0. 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/GBMJG2324577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61aa10f67da62884f031027f34fd73db37fc8f9433b6a1c5576229fe10a1a48e. 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/GBMJG2324578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0970fbd1a9ca3f61ee21cfe9c25f566197a1643c9284caba6e7a293518867542. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBMJG2324579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1fb4bf691041078aea3b531de0c46e716b9e75de7dfd97b910451cab1f98cc. 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/GBWUL2228834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb800dd7a550d767a3a5097c826032fa6d02851c0a79942339c92a3ec430e1430. 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/GBWUL2228843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff75cf6f3e1a5062b34fb8cf24ee7658fdaa688e2bce11399aa30ecba49e5a. 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/GBWUL2228844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15692181f1bd7d35dec9d063eb390f6ceec7437ba695e9d7221804ee25cbcf. 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/GBWUL2228845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687bbe7439c093d597458be2578519c5e6b9fe89fc904d4c2e0000e131aa2384. 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/GBWUL2228847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3972f93c66d9408bd9c0e35907a98bd31fd12d3b26c430569dbc5d2f980c4d58. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBWUL2228849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8964dba768bc9be1d783833ba729dedddebc3b931be09ce9394d6ef9f94e4dff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBWUL2228850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cab3fa6d80c8bee8b8689d223878de8b80021916d222b5747489fb281797ec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USLZJ2217761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a555a22ff4b63fb4b264f04d6cb4541d1cbc6a2a651a7844a77301cc30f84a. 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/USLZJ2217762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d411e639c5f33b66af5efab2b1d7a006f5f631ee46124766a6ffed7bf0fa661. 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/USLZJ2217763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867eeada4c90820cff4fc2116602fdfc5a856c4fe625e651881ebf1201cd10a7. 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/USLZJ2217764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1035383fab1935f22dde73449db4dfb09fe275e891af5f67d63b52268798569. 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/USLZJ2217766.