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 0x9b665ac53ef53463b43f6c4e528f27a0b67bfdaa0dc85a0b887912238558a029. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ee6ce01-846a-4dd4-ab0e-ded5354afaaa.json and https://artists.proofprofile.net/proofs/artist/4ee6ce01-846a-4dd4-ab0e-ded5354afaaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tango - Original Motion Picture Soundtrack
Tango del Atardecer - Tango Film Version
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 0x9b4699a4d2a8309a5af1144671ab3c8457ada4d0dc5f974e32afcd49fb047df5. 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/DEF059704140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c1403cee96558e18da23f08eab802d07d194bcacd2bfc712fa6600e530c9ef. 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/DEF059704150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbcb62ea387fdfec9b11f89a23606b1e8933c4b036a130fd1b5db1661aed001. 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/DEF059704160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a813f22dad677374adea08994c7842eeea994d13d057eeb3acf44ae9e5bfdd. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEF059704170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5501275fd8c234337c84b17023b12562eb708645e1c521cac9c898a6f4521f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEF059704180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d409611385fed64b0b173f45df4d0cbabd3450192c5e7f0398a1d62b822330. 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/DEF059704200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e8db6505c2c49f6e0ca45b1b933654530b63b0728f6819789f11743449df2. 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/DEF059704210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d3727a85b81d1644597effed5771ccf03ee785f784f2972d2ef46c4ca97d20. 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/DEF059704230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc25f6b55b98870554949e1f19eb306a5c97649c80c0d82423ab3dcc1b799b6. 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/DEF059704240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d93545f6517f5aaae4fa7121d19e8dbb4011ee0b8736bf0362787d9a4e8860. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEF059704260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe869636671badcc452feae6b0d03c6ea4ce01e3fe3b10246cba7e8d0b15f0b0e. 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/DEF059704290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9957d6fd806ed74a67256b2b14cb318e0c60108dfce8931f6402a68b1d3a3082. 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/DEF059704300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8646b9d3ddabaacd12b1c294d679928c043df011538ec69e6ba6301f363453. 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/DEF059704310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb806dbe3f8cbc21ccb519e29d5cc011b33f017d570643c8daf27f0c8ab0adfdc. 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/DEF059704320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442b10797e25c58e7a17037f26ac90226a0eb613cac979a7cec1a6a37721079c. 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/DEF059704340.