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 0xd6039015329f1197e058721989e2ebcef82cae865fba7ad7fa2670a9d497f74e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/274b7d9b-734b-46e4-bdfd-848365766967.json and https://artists.proofprofile.net/proofs/artist/274b7d9b-734b-46e4-bdfd-848365766967.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 0x82f8b5246751da31bea97272e23cfa98915c1a8dca7bec7400efe2d4b68dadf1. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZ5AB1645382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c6568d2555b240f4c99003aa5d6e3828a27abac1c62bde89c4234a134248eb. 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/QZ5AB1739464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19058cbd9ea116d54cb6f58e655773345e2f77281d881c3a9742b5dc74ab4fda. 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/QZ5AB1963478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc9fdf750c877438203081ffd980ddc2715a8cd43c69307002c0428d88f507d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US7VG1807367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613064e0beb2a9f9df50c285cdd70f32e8675f559a204564c581a8178fd91977. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ32173968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fceda1b676519ea2074e971ed7f9173234e5c1a89248e0285b5d19c6ce1278. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:42Z), 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/GBRKQ2263333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38ac90c33838d215919a7ff4d608ea09d0e01f672bf24d232b901c4d1492d39. 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/QZZ8B2391074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09a7f5cb3350df13d8a65bf9b1ad5a37cedfe9e7fe2a703d232a526712f5dc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX0YS2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b8a686fd3e61d2bf6f074e3e28be22021d1fdd3e8530e646cccffb6f873e4f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX0YS2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a4aa1eb822e210189ffa64266362cbf620badf554b1700a46019c16da2c222. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX0YS2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe1dcbd7d710da92b200cf89dece14d629a03a5bd48977ff781b6c18b1ca38. 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/BX0YS2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52c3c2797ff84b6d62fdf807d30edd43c997689890df903a7a0b02a25c616a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:06Z), 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/BX0YS2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb47592b338cb22a706afb37c9f52db86e47d30d6ed26f43de438ce89588a48. 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/QZHN91926107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aa1eb3ce9abe23903e0626299c8ecb703d3fb0f88b9635da3358bc95951110. 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/QZNJX2131076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657daa0d022273652d476e4c715156a51771afc5de7c6f20f889b2632728de8a. 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/QZES62262414.