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 0x2be33bec4995f3678e4eb5528e85376fdd453768db97e9825aef102176656f28. 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/22f09fbf-1846-438a-ab2d-d1598f7e9038.json and https://artists.proofprofile.net/proofs/artist/22f09fbf-1846-438a-ab2d-d1598f7e9038.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 0x36b5cb1ba7a4d36ef783a8ec7764474ac7bd2394e5c543b636c2c0af8cd772aa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEZC62384678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e453b22abfa2f2e398fbf3828a444fa86a6b8ea58a933ffd95f733086ef91fa. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/DEH742328599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdffcf2817357ebedf61d48efe2c15d6231a88f039859ed760318a19c01cb44. 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/GX4R52319076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a9ca1e898720f83c94ad69d5c3899d29935ab6032a9c3961614761832e8fe6. 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/QZMHK2340934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26631db09284f6d35e6406d9c4b2d8297da59b3e49f63dda54cff2df1910ff. 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/FR96X2351179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa431f7e700b84af6a2a3435b731350740ec7ca56c57d4da0d7859ceb4fc0ca40. 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/GBKQU2329371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d5bd526e4531f7566fbcd3f47507a2463fce9c996f25396433a0d910293a78. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX8KD2397682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b16d2178ae0fd8d82fa178f5a3f57003deaded81c23f0c91fc44ef9c15f57d. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMFME2264946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dbd12aa3a6527d5957afc1cddfa1aabc7be9983c8d8e19723b31ce480b30fd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEPY32200356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601285efaf8b9916c0c70d99c2fc97d72ba69567bbcef99f409c50cee490a14f. 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/DEXW62200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea4951fcee303d66eb1a5cb1f319b83bf287e26357c316e5a61948ac24c146. 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/GX5MX2266080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab968c0d11bdd04bf0d227ff533b45daee8ae007ca8adeb352c08a0dffe502f. 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/QM6N22233834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe782cadaa49731ddaf15914f45f8977ffbc1070174deaf0bffeb564d233abb. 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/NLT2H2100828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc2d4af28f91df16b87cdd83ae0dc2156611c394f560ead6881a84e12547be. 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/NLT2H2100658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b161ea3971832a05800d422b167bb1ceef2ab38db74b877f1703a0735a1d3a. 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/NLT2H2100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a67b6660511e24ff8aafb14c54cfd3724f2e2e8d7c3a39d8a8034a57ceedde. 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/NLT2H2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11855e5839afbb9929beb0df34bb1dea7b68359919261e4367e78368ca905189. 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/GX4R52458844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d649da2d47f1141ebc37d6fb247ee6a56290f8972939712a5ff3e79ed61148. 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/QM4TW2447123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b4cc6b9b4f17be673ca69e1fe2ad856474e13fe6d8c27b2a88c913364df82. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/US38Y2417774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69acbeac5359cb9cffe27f457ae73744a0a76613422a82b550d727f9cc5825e1. 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/FR6F32200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ad0640264b4c56c57570679004b47870400b211326057cb9891d7420319d3c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR6F32200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4966112c4f24718c020d7964b00222415cea3d64041a593f2151b723f6df354. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR6F32200700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00764b913b64eaa69cba862555780be2d6930b7b5b169ce0bea664bb9e25c6cc. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR6F32200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88088e3e716aeb9412f3fdc6a228b1fdd4995439a81cbc49c5058a1733c4e2ba. 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/FR6F32102680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c566604f4016a136595b25a2c42c30e64220b44176989452d5a52e847245e9. 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/CH7812529461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0d8ced2524ad223b57208858705f67262350403d65fb605fc81b7f063ac81. 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/CH7812421304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4f6eb0da0d549efef3bd7f92a56eefcd132ae394d4f1d03adca648b5d0001. 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/GBKQU2317279.