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 0xc0e9dc5adacb7d1410ace3dc10a1cc01d9d4e12d76abbedcdaf07a60beeb56f3. 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/895fe99e-47d6-4075-833f-7bacd58a5776.json and https://artists.proofprofile.net/proofs/artist/895fe99e-47d6-4075-833f-7bacd58a5776.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 0x97dfb2130cc37d248a7afcc4c8f1b27a22957584e4db475ecf6633479b36007a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZGWW2053648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f61b4bc6ba13c650475cde666b7d556f5e6254a4120ae8ea4802c8c853d22d5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZGWW2048507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4240d5ed64abf97c4f1e19a1181a08c49966a5e25cb2342b02036d33607c101. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZGWW2053649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522f3016961594080983b8dae84f974e40b624ef4449fc350ddd26423dafc37d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZGWW2053650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2379d7926cde57889ffaccfb145d3d64640cfe6a7a27a7b3b97147c66b5f0339. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZGWW2053651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7c039da965c5e9dc5d2aefc0868710e42d4fb6404439052094a643234d1b6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZGWW2053653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c887a530c757d07e160485446268f6427f571d52eb61b2e3cf4164cfe4be94. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGWW2053654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa6e9694e27901f2aad1f38a514bd95a6a33a2a9b059dc33cc6690e097e5f2. 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/QZGWW2079381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaea6c0769d3327683bcffeb9a050c6667cf6e22746a83b3a8a2f13392dff515. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBKPL2141777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6c3857766f7a0a3e3a152c8bbaed4176ef4e7c744ac096bb72a4c05a7cd228. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBKPL2141778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d93a95d6f3a002a8587be500719ca5e16750f2202af18699fa73e03f835b1d4. 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/QZPJ32131153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd94cf1fcf4c748e5f6c495d359986be1bcd31b10d7c9913224317ff3c6ad84. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZPJ32131154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30a2feb1ee60f13af5770cbbd284acc8f7327c3ec24380f3cdc8d5e04b97389. 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/QZPJ32131155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5250cdffcbb9137ee046c55fa7ab967ad989c6f501a148666d3a9be7d5729f80. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZPJ32131156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e01ac9d0bc3941c874549c8986d5fbf632d8c408cf77cc6e21a6071bf9d09. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZPJ32130846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bc1c41c5f06d9de78f03d090087afa167da0d928c81b1002ab26e3eaa74cdb. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZPJ32153656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abacb10c72523fd3f943d8f5fcc58c4f9b2dd8db1dba34a81859cdfa9d49a05. 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/QZPJ32153657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22302482e6b0352796af41559076a2fe1e559546464194408ac7bf2b5573f1f8. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZPJ32153658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d0fe9d2284a7abd7615e813c4ff88dc7d90832ca68fb729cf1c716afe8c39f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62256080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf7bcf6660b28825007b0067d8b20ae56179d6d52fc777eb85bf03771dcbe69. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZPJ32286146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d18c58be6008b2bbf0b520ad095e21b198003cf42e02aef8ea47a0e1417170a. 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/QZH6S1900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2a32d5a23a2fe4731bbcb69a73128bd2fb6a63bb773f3de2f392bbe7849b3. 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/QZH6S1900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25b1d775c48f7bdd912e9222f6d15b5f971d32c45a6b8637ca54d42d9a08ca5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZ22B2033380.