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 0x8bb29bb4c42b7c0b67874108fd69c0d6b295f4695193b6f6221bf34fa60be904. 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/4b742448-026c-4698-9185-c822ebcf1770.json and https://artists.proofprofile.net/proofs/artist/4b742448-026c-4698-9185-c822ebcf1770.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tribu Ancestral, Vol. 2 (Compiled by David Madrid)
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 0xdebf148c4447f1f5c2d24b78c0c119a66689441dbac2f1dbd003cd61bc96306d. 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/GX8LE2412242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc994160872cf7d7b8ba45f76220c2536688b18ac854d290a32e102f44863939. 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/GX8LE2460476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896010e5c714151a373e84b4bc088183c270e05a40e375adc9073d38e8a3164. 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/GX8LE2467492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e73729a2e62c13aa80de3b4f00a23722a81195f10097a6a36ea6c1a4d32a14a. 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/GX8LE2491260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a7fb3c64bd33ea0890ce36820c3d8def3edaadbec2a08a00839c1b302a01f6. 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/US83Z2425544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1bd31658bccbafe6005027c58bbcc62bbfbc06922ca35ef2f1d27b8231a20a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/US83Z2506075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6209787a69f19c5ef0f22dac75cf5c53a1c9cd666b01c9b1cb84e45c8ecf6df. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/US83Z2522625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a7b89d695b9a050b6261ae4f0d931011140faaadd4121dec348f310242850f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US83Z2522634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20265803ae9f49523ed8c5581a6c48d584e8e61197be1e11082ad45bf978074. 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/US83Z2529030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840bc4f84666372ca852cd61f089a260669ae421cf0869d77571cc58ce5905ee. 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/DEY471615881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac216e7f1c53cf21e6ae4d5032206a028941438f76fe4abb52c311ae4b3290. 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/US83Z1768390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e49f3d8918fa190cc5341a63782f4b46660046598bb1271348232d898953ed. 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/FR85U1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a37e3906c9da77a4babe530ef40c031e2210bfb44d2355f4dd28c4685c9d518. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z1767786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e49f3d8918fa190cc5341a63782f4b46660046598bb1271348232d898953ed. 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/FR85U1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf657bf0da16ccc5fcfba0169abd9e4db78f920d62ae640bffabf02312aa02147. 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/USLZJ1941950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86a461d6c7cb0a1c33ee24cde4c293e74e9be4231e36e4f8a6470bc8d33dcff. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US83Z2037456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c9f438dd11adf3402bf2dd50837583a43b0b652a0d5e79bd5ecc94fa1b8f6e. 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/FR85U2400077.