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 0xff8aefe554a58ce53757406c42ffa80c71496ce50472c32e6011740ca322a912. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc4c170c-a822-4103-b102-d796ce956e7a.json and https://artists.proofprofile.net/proofs/artist/cc4c170c-a822-4103-b102-d796ce956e7a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd93f3664b5926a4f83525b8cfc9f0ddad086d83869c5a7c21e1a428fb9fcce. 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/QZNMT2270123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9caada51b628159773bd2bcc8cfdf0ea4d32ad741205ce2a5d19297881a6f3c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNMT2270125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ff303d5203fd1c3096d4f2b087aaddfca23b8bfe2f8e877d40596f9cdba168. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNMT2270129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3a575d25acb9fb1ed625acc81d52eb5caa343c6b3cff9e46d3691b3ed46cb7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:07:34Z), 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/QZNMU2405688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f820c6c2ee1213ede987cf582254c33414fc223e95934d80bc1fb63de07b6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNMU2446191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6cf4627ecdc7c73d5ef6d661fad091c6ed9e8b8fb981ad63a9b945ae9772c5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNMU2446192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0ef9be51de7e4f9f6a5336689e5a1f4d3a3a04cdf47c26afd4639e6efa09f5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMU2446195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb2900962327a1e335bdccbde79e9ef015115414dba44de097cdf2ac5c34a5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNMU2446196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8958ac4ed34886a3b5f596175d1426b1d2c9cda4edfaae1c2497668e8b9723. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNMU2446198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcfb83966ddc77544561a9534b8ce5cc7da0a818933fd4484d9d0af385e7ada. 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/QZNMW2412807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9995101dfa72c5b1e60c19ce34c38b2acffd8318f13c3bddd17b7ba2e379f9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNMX2440265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9995101dfa72c5b1e60c19ce34c38b2acffd8318f13c3bddd17b7ba2e379f9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZNMX2440265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f556a5bd3e4d5a1157158bea7708ea7fad6a70849efc0e17ddb8ad7881bafb. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZMEV2507652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f5089169cf70de541376f36922287ad4b3b8c23b9e476183d75a879a0edf6d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEV2505773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f5089169cf70de541376f36922287ad4b3b8c23b9e476183d75a879a0edf6d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZMEV2505773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6888a42094d24ffd8cf60f3bfaf26cfcc33134a3dc817e26888cee0bc5767de. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEV2571884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83acdfab1e50acb384811fbefa18ba50f9bf6871954d45113e59c013f3062b86. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZQAY2575545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bc2b275c9ba981d9704b585466e8a603efbaff2b12e030aaf89b6863defd0f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:48:29Z), 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/QZQAY2517360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0ab3d5d4e18770504c82b1c7835b4abac434738bc689dddfeec4f3f7b0cc3. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:32:58Z), 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/QZTLA2539385.