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 0xa2485f7c0088d16417eba3d0b674b3b388016b6ec6249f4df11e12d0deed37ea. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/702637c7-b2a2-4c1e-a80c-af404bafebad.json and https://artists.proofprofile.net/proofs/artist/702637c7-b2a2-4c1e-a80c-af404bafebad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alianza Musical de Cuba: al Son del Caballero
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 0x836a91718dc45276fa2842a538373a84a7d2105be5aafb297ac9e0372ad312ff. 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/CUA022114766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1b23b770657c63a962ad28c518bc98ce4db19b3ca700ba9de1c10528a3f34. 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/CUA022114767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb44c2f58a55a031b8bb6d7254956e053eb6fdafede55809541ea0d17bafdb8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CUA022114778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c467994c9896530bd95075b12e3853306a1306128160a6232165553547f9784. 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/CUA022114770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3452080d9330df313f1b6f14bc5fc389dc03ac01292753073147a54397fbb15. 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/CUA022114775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366658f395b334a9e3d2b39f56a70cb2ff58b88447e0ff65112d8d76994b4b58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CUA022114777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc684ff72cafb7215129f4fe98b28e70939ef7c581ae64715b80916e088e063. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CUA022114969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bb01d47a4dda65b1928d35e589fd2fbb59b0823a41d07f4eca9bf8d6893913. 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/CUA022114971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8eb704a53e3e469b7e4509c8bc2e84afff679f2c63c048c1b3a1152866509. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CUA022114976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39a6b6705c8be7e20d4f1d3dce8781a67a675aa261e8703889faeeb4d8d579b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CUA022114983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b9de04d888ae0297d76480e0b476101341884124049627f17df99dfc023a9e. 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/ES71G1644875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb2679e0549151e59cb966d1d20a515babe03f15cc563d68d50d7a6bd7f3e50. 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/ES71G1644877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de52e6dfe813312b0a037a22655e1b9098212d6225793a826c0187e70792fea. 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/ES71G1644878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09aeb739b8c0f646df20378ae07abcba4292b2bf411f1e3f4a21c5b5f8e434. 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/ES71G1644879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347e79394c3522c2af4de2646b03336468e5d468fdaf595845e4f82a63231ba. 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/ES71G1644880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c1c39112459d5c6b686c1684efbe5ee2c2509af959fdb4f74ac032a81912b3. 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/ES71G1644883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e9f4c23ceba932659378d01e3cf6878934ba2b368654b48a826551c9d3d813. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1644885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3452080d9330df313f1b6f14bc5fc389dc03ac01292753073147a54397fbb15. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CUA022114775.