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 0x24452d96b24c8be2ae0320011b9183dbd3905cce4d758550398cace71eaaa6da. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/962f614a-8d3e-49f7-af53-84c6ad5bd942.json and https://artists.proofprofile.net/proofs/artist/962f614a-8d3e-49f7-af53-84c6ad5bd942.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 0x534c6968e5847d987ef860c4470cfce44c410cb2991c137438a63c9cd7b4a586. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEYQ92000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5df63f5299462bf159761182a72d3a1fd44c149da17b55ea550ad26f98e9da. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEYQ92000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495f5d131e80e2f16ad026066ea4051f338058df6731c6023674f2fc2829a751. 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/DEYQ92100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee301e58f148b911192ffcad34f8878e0e72ba2ba83441c597baa95aeaeb9ac3. 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/DEYQ92000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4f6333c87cd1452f9b974efdcde4376241dfc87fcf7ebc1b4a54387f7e705. 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/DEYQ92000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d1194d4c85cbaaa1a1dc187b9b0db698fc5739692b6bff9876a9ac2065eb32. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEYQ92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc1f71d1f865c8db087d5a6f29c894b56a32020c0dac1b697a4f8a725871f4d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEYQ92200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa914d347c4e5992618e5d75947a91ff141132424436e1cff1b02cdc2392b6e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEYQ92100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37ddb72d0f05ec671dedb2c06765e9b9810a97570b0df89157a541e65444dc1. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEYQ92100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9623fc6f163a8c417cc150ca6762d4b2ae45efc4a28ea7ebfbb6237bb4611. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DEYQ92000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893a13923d3d4b1954f6cf95ff3c57cbef5a3ce7650f885e5fa155b31c44c2a6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEYQ92000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be5ccd29656721eb7c54a5751a430acdc0acb374f2e8578a5ab5bd49da15031. 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/DEYQ92000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129649c615ede6ba360c165e691551a634b24d7af5e5a8d15be8832c37c4a207. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEYQ92000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b1127e99f4e88e34f4a33e7f2725d5c69c95ebc3561ad030ce975a642f24a7. 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/DEYQ92000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce4b00b4415bb51ec2553c4765c81ed56ffce8ae7aac0377fdd03472b3a894. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEYQ92000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273243c75a10a088b484f260ca3b1309f57209a73947474e7195b500c1219958. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEYQ92000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7befd0b5265303f6d267be05ce4d5afc10f0c4c1d89e9b145873c3e62a3fd076. 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/DEYQ92000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100b15dc2d2dc1af2a1ed140bfeb971d1652c163b4550c0fcdf003be93098f3d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEYQ92000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac99f44922516bd1ab2ba1146500a580476166b9f21829edc02a98a8eaa9b6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEYQ92000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5085125ca2ffe7af0ec06373268fda580bd68dedc3b75d98531ec3c0d7ba63. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEYQ92000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357fda1429a1d0fad3760665104372598f15e8b5a5c1ff73bef43678262a36b9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEYQ92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d5db015bc998deffce40799c68f7052c282121421e17b02b40e6f58433a28. 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/DEYQ92000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047bf6b85173d6d915f3fb82b50e807ef326d41b1680c7d9740c05bc0623f2f0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEYQ92000001.