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 0x1296a7eadac55baac9cdc474b675a5c58b9e35df3bff478f1a7056770cb82031. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ae92cdf-f73c-4a55-bb96-739c67878f1f.json and https://artists.proofprofile.net/proofs/artist/9ae92cdf-f73c-4a55-bb96-739c67878f1f.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 0xa3281f335b8da48c4968713129b851ea4a3e0c2da3134fece3530c491747de6f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFY2194857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3035b4807dde226126046444e98c46cdecacd1078d10e138beff5aeaaadc68d4. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCAGD2204451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe2ced6d46ca7460aebe084cc7a5f10910fa0f747d9d7e2e3a4a84061829499. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAHC2370313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3ccf25fa038b0a10baca7468b17a8413bf400064addae847d7f4888c35aee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHC2370474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7130b60162bc816830953e81471e40b3d6e26af98e7ba46e00c2fc421b05ae7e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:46Z), 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/TCAHC2370920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a5f33c3ac8b2e876e2d995a3b4104b4bd81b9ae49636e11b6768f3bb3fb1f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHC2370928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a407006bc7e61e2ed5611cbefcc01d4e90cb60e1bae248f6183f14ced68a68. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:22:39Z), 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/TCAHC2370931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c168b0d0ea84f08cae50fb50631316ab2407fcd07e3d5ce51a06f453630d085. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT37V2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a7b5e8526714e325874dc5c3ea7ec7001c7393b2d92dcadb61160a7d41c8c4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT37V2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88a9f8d0ffc803bbbcb8c87e464f5bf7a70820a1a6cebb923444e7306e4b95. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QT37V2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a7b5e8526714e325874dc5c3ea7ec7001c7393b2d92dcadb61160a7d41c8c4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QT37V2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d9db9843eff7eeb25c9e3a9e38b10997b2b86158415156a67fdef53bae4c61. 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/QT37V2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7580b34b12da66fa6d4490ddb1e9e14e3f91e967c22863b56f102d97b3f0a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT37V2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7580b34b12da66fa6d4490ddb1e9e14e3f91e967c22863b56f102d97b3f0a2. 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/QT37V2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501892f8d759b99a146857e01e867c5bd3cc8e002b8694f24ab11b0765c4fb33. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:22:13Z), 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/QT37V2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fceb39054bcbac12543841b28bd556e3e60c40be3b7b3524a22013c59b7ac71. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT37V2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33fcef3e5075310ad8722858d16f9638508a811a0c9e137bf6ebbacd0ee86c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT37V2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d69710c5f4e00122cb9587344f1a1c301cc1987c48991fa30f2a747d1c7e7a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT37V2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44fedbcbae1b9e51fb2c3bba636cce3597362de32849b0a9c8111da38b68256. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT37V2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb187eaa41fce336ab5bcda9759dd34604fcb31feb7489742ec5c27c0753c5565. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT37V2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727ebf669e47028164933d8dca0ce9c3b4486bcb5a9a58e5c913c85f1bffb86e. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QT37V2500029.