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 0x0a50116b01bc61b99d1937e5f0b2e913d2bea69e466ac5119d99870695732b3c. 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/cefb198d-b2bd-4485-8eff-b6d24b148115.json and https://artists.proofprofile.net/proofs/artist/cefb198d-b2bd-4485-8eff-b6d24b148115.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 0x00d15c45f572bf14b804c080d476d7a2d9c20434e14b0e0650222697ef78df5c. 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/ITDF62204002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908c18f5926ac5af87b89cc2c8f5b6ea1d5710ef724877b3b4dd0cfa0710eb6d. 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/ITDF62204004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce001c9393468c4975a7ee3757ce6b6921bde92b0a0f48886e2b1df3536e3b0. 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/ITDF62204005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c6f1d969e516901ee62181381a3bb0599178bdb5eadaab99c245ae0e9e455. 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/ITDF62204006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4781f00808e47da6f8e4ed355bc414f539d1d3553e76da0a25a4c52c34d92db. 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/ITDF62204008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b466bb65e14450d3996edd9f83a4fe5180e78c71988fe5c791ac29b1d4168. 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/ITDF62204009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75d95b4be81ed386f2a136704a46a7b04bbdacd31d35679b870dff4303dd68. 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/ITDF62204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881af0c7170407756d6b581bbca8b4aa0ba2f4aa1e6bbaa0d97a42d6a7217d2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITDF62177502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb0d4dd74305d9fa3694b704acd0fb28aa81413a3fafa17e2fee4e6d75fbf3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ITDF62177504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10c054d906431a10de2b3e16f507a6a789e7c2254e7992e68cc770cb6a8766d. 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/ITDF62177506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff52aab5f2e70ccbb222c9e505686f523f66f9ffc016f610fb06a9a4b0884ad. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ITDF62177507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec433747c6ccd8fe9d675ae824139ac509f177889c25e15a90e48a94b826fc8. 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/ITDF62177508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0da6f886bfc5dc8f0663ca1e6abc482b263566a5ecd890a554e427b7175e3. 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/ITDF62177510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881af0c7170407756d6b581bbca8b4aa0ba2f4aa1e6bbaa0d97a42d6a7217d2. 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/ITDF62177502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bb0d4dd74305d9fa3694b704acd0fb28aa81413a3fafa17e2fee4e6d75fbf3. 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/ITDF62177504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10c054d906431a10de2b3e16f507a6a789e7c2254e7992e68cc770cb6a8766d. 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/ITDF62177506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff52aab5f2e70ccbb222c9e505686f523f66f9ffc016f610fb06a9a4b0884ad. 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/ITDF62177507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec433747c6ccd8fe9d675ae824139ac509f177889c25e15a90e48a94b826fc8. 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/ITDF62177508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e0da6f886bfc5dc8f0663ca1e6abc482b263566a5ecd890a554e427b7175e3. 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/ITDF62177510.