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 0x5d0df9bebfc39879cba28ca48f0e59ee7f6b578d498c42da984a503d3b3202fd. 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/11e2456b-bc8d-4b4c-a20f-27714fcf424c.json and https://artists.proofprofile.net/proofs/artist/11e2456b-bc8d-4b4c-a20f-27714fcf424c.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 0x65f6fe2da131244fbb959a623bdab350f6cc4c0261fd1de4e44eafee8242f33e. 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/QZQAY2158377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a299c85e2e1c909c9577c63f631226f774804f9d55399c631e03581ddaef3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZQAY2177059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299c39aa73a2c66242d4a031041dcf2de3a59a2f82b6fce468b5f45d488c728c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2123727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec170015909f97512dfccc90b35da43b27dc1b26274cbb2a9c4c880fec652f5b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZQAY2188219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f7790eb5ad67a086dc899034933b9bdd47ee9f6cb2d796da65cf7c392dc82. 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/QZQAY2140568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecf6cbab4757f6620daf4fb256e34c69f8136fb9fcb67b798c93b29f4df960b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZQAY2199940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94a704d0035dd25add3818b41f8a51b13995bf88190690e4a0ef115b805235. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZQAY2155581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6ba0a059298201d66be7dd60e0c2306d40dc6ed6c8fcfc3831476f9bc17471. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZQAY2144044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26d0ccc12bcce51aa370bc9832a42f149bec947f74775d5fafe4ddcbec9a407. 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/QZQAY2169690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189e9b334a7a3e3a9b07540780016e50d8a3c69b4316c8c597883b33efa5ae7. 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/QZQAY2165659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa4cc9673623d4f2f4a77227bea0c05470adccbdc6f5a765a51bff95184aeab. 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/QZQAY2101611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63adbcdb6711ce1660d1cf771390e7784b8cc111866e3f5d99c499b0ccbebd5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZQAY2162431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc335040a9d8eabbc4b3c4637d1b250a7ecaa98d1d38a851600a54c8ba093f43. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZQAY2113635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec392789741d3f9e51db27627097f0be5983a06bd29f0c1e75f130ffe7dfb6. 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/QZQAY2123182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4485f6543f06843f227e31b5114ea05417c787899507fa8adde51614a05ef5c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZQAY2181097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b8ba044922bd265097600e05c10604dc75b81483cac2b7378bc85f76cf9e47. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZQAY2160705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e41343e0bd4131d558c1b82d3f4c85534c68f3c7527526e7a4a660be901d156. 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/QZQAY2153517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539d95a75d4af77870b07fc4144e69b7aae1c32b66095428067b4edf8560ee94. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZQAY2132565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec092835c8bc6705aa723886245d2a70f2738a5a3a9bd41f514f7db586f1381. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZQAY2182778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9a4306499df02da4dbe5411a44adfb1223c0c2fe1f79aa63c8c18219b81e52. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZQAY2163754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42feab399b9746f794d0b8e7a73c687cfd6495a8e593024107eff312c70375. 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/QZQAY2136651.
Un Par de Cervezas / Júralo Mi Amor / Ya No Volveré a Querer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b1386ec0e93a6210662c76afb03640369a19d332bf219c5a4cad6f83016f16. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTL92182770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80158f334a4ad07be661d443ddf6b4629c5b3888e9a579ca03740ea8955da305. 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/QZQAY2269931.