1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x9597357ab71a7f198e8c2ae4ac823249b1fa86b4ea60458963af407c401a659f. 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/f6e325a2-5a34-47c9-aaba-7188d0ea6775.json and https://artists.proofprofile.net/proofs/artist/f6e325a2-5a34-47c9-aaba-7188d0ea6775.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f53b1b1496d517ed8d877f7b581210edae5f77641a4071a6089fb0672eab617. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2WolKw0yREKvDqD3oo9IZs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2WolKw0yREKvDqD3oo9IZs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc838d2d27f9f2c095353868f00e007d0f3bf0e37b34265f623e8c1bcac3dca5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0PtLrH95CQ2lKf6pym5LmA.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0PtLrH95CQ2lKf6pym5LmA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4ec52185063cc378abd73eea788f7c440d99bc8c17100e3d96bc38007ed15. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/10uuINeqxckcD70rf1h4rg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/10uuINeqxckcD70rf1h4rg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf55c179ab521db1197d48e2fd17a7db6a1b53ce7bf755d108d29b2cbf149386. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7hLmYiW1F8MS5nW7YAsGuq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7hLmYiW1F8MS5nW7YAsGuq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9fef3f9a293ba23b9cf172b417ba460aa3edac16daa51d0643f096e232211f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4ifde2kVxjohXVa1yIRj5y.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4ifde2kVxjohXVa1yIRj5y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4ec52185063cc378abd73eea788f7c440d99bc8c17100e3d96bc38007ed15. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5iKzJZm9RVeZepDWBHT8p5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5iKzJZm9RVeZepDWBHT8p5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf729edb6155105305315baf4768c382cda72fbfe21714dca0f2064ea6b7d34. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/30yV6D68RClW9eMcV3zhxg.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/30yV6D68RClW9eMcV3zhxg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d2b2b2e056bb2ac5684024bbad34ff21ad47a94c5096f6725e9719f49958e6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2MMc0y0kZlTnjwdsPoAs71.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2MMc0y0kZlTnjwdsPoAs71.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf20e168c53a03e598e4402e2b5b15ebc10dadb62faf9ed1ba37c10c53a467ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3khLvxuHYeqSmnY0BSDHlF.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3khLvxuHYeqSmnY0BSDHlF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b4ec52185063cc378abd73eea788f7c440d99bc8c17100e3d96bc38007ed15. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1kvPbvlI1yDlvHS6esfXK7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1kvPbvlI1yDlvHS6esfXK7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8d7ff351909ebeb446abd58dfbef7f78cf1b7ba162ca1779568c1ae36008b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5t8QV3XtxXfytuQtLeEP62.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5t8QV3XtxXfytuQtLeEP62.
{"copyright_id":"0x7d6a08ec5808e22d9834dae178ac603fe0124f9f8385aef29a8cf2c07fbd05a1","isrc":"UYB282100010","name":"Me Has Dejado","registered_at":"2026-06-04T08:38:13Z","spotify_id":"4CgqzEBRW3AeuAVoDjisiZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a08ec5808e22d9834dae178ac603fe0124f9f8385aef29a8cf2c07fbd05a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4CgqzEBRW3AeuAVoDjisiZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4CgqzEBRW3AeuAVoDjisiZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a08ec5808e22d9834dae178ac603fe0124f9f8385aef29a8cf2c07fbd05a1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6ojA83SXbJ5BKpJucn3j6R.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6ojA83SXbJ5BKpJucn3j6R.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f01b400586e94079daf5cea7d7294dcbe47b218f4eb65e5254d6a45c476be02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0YAUCdlqj9rV2m2n1dX721.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0YAUCdlqj9rV2m2n1dX721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e66ee63b41c3ca7bcbfc20ea7ee7063ec1ae347119b873b530f74544da63da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/01BwIKOWuerxufZ0sEmJnS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/01BwIKOWuerxufZ0sEmJnS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8c8c45cf456e481e6b292e5a578a3b1754e6530526305022bf1534b3b7c01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5lKJ1l5B7L2EX0Q8wJtHDs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5lKJ1l5B7L2EX0Q8wJtHDs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60567f2193a2016750766faf64614e71a2f44f367265733067e34e107e016690. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/41JdrqZppcaby7ntCttPfN.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/41JdrqZppcaby7ntCttPfN.
{"copyright_id":"0x79a98e21abf20016ed9a249d0f6ded79e7241285688e1bbcc5e636ebaf1d61dc","isrc":"QZHZ32052790","name":"Me Mudé A Madrid","registered_at":"2026-06-04T14:57:29Z","spotify_id":"2rNDV353sEpIhzxqdfm257","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a98e21abf20016ed9a249d0f6ded79e7241285688e1bbcc5e636ebaf1d61dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2rNDV353sEpIhzxqdfm257.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2rNDV353sEpIhzxqdfm257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2af28858ee7122b7e701ade403da1ed8c8163fccadf475f5aafa4a16f6b5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6TdbQOJ6iRz8w6jUpoxMOm.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6TdbQOJ6iRz8w6jUpoxMOm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332deedd3590e3ac2ab9df3cd45697efcff6591742b71daa99b2e3cbd56a7001. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6u8mmW05ZaVLzgxjZFrybM.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6u8mmW05ZaVLzgxjZFrybM.