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 0xdf29a40d0660a0bf5a60048d82eb375f9a807b5ed218a8e9a7c0abcc23ddb119. 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/15ad9b29-a9d9-4a47-8209-d57551658781.json and https://artists.proofprofile.net/proofs/artist/15ad9b29-a9d9-4a47-8209-d57551658781.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 0xe3afbac0e4a94f59785b0f0a527377165b15495b37ac56c930c42a39203bfeba. 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/SEAOF0605210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8fc2f39ea1ba4d052f050f8a6248e6ddce599751c0ea05bf023d5c952ec761. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEAMA1000334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c9e24f92e38e3670e77fde8f888de1e3b11a00a70fc43030f1953e44395c9e. 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/SEAOF0605190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755a463c7c8cf5c79a37ab0a78429e90a03d2538979664482535cd7db5f97d6. 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/SEAMA1000292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471582da472a034a9a0eaf472deb5b6454b32d9a76736cedce97521385bde936. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/SEAMA1000255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bf126dae1ddd6b0cfb8ebbdc1c848b62b9c89902cb035f183a5775fe570e44. 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/SEAMA1000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf965e5e1a110cc0dff0c3cf2c6fe521720a7835fa7051259e53dbd573aa76bf. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:49:09Z), 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/SEAMA1000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb22a241772ba74136c357058b3e66e7be2ab955b48beb4a319e659fa06a617. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEAMA1000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd80609264433f3d3ea4674631ec74d8a3644b698cd22b165f0fa3eea0a161f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SEAMA1000271.
Hatten av för farmor (Hatten af for farmor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1337df37c102ac14e6a7228d7c34c7acfe62cc1da1bbec9c8e509045719468. 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/SEAMA1000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf27af9bc85ea567aa8ff11feb055ad63c35d4600de78c5c2f02b5553bb2253. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SEAMA1000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef2e48c8d2fe2742545d1a47e48f60d9cd5be50ae3b3337ee29358a66f908d5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SEAMA0600414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da71fc79b81c2a40aa520d3bf3fc1e20a23334d700a7efd186ae65f2321d0a0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEAOF0009020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed6863b67418a8e25c8bf8e50361250aedd619ab39f3cd130505688b917453f. 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/SEAOF0009090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b5c8c61d16eddf9a431d829ba4cc6fe1e41cc648456b31b63fe16ba9296ae7. 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/SEAOF0605020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638fcd41672689f15c0fbe2d8d8808e8b2e330a0ebdd2ac69b5e68a6f2b5eb2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEAOF0500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638fcd41672689f15c0fbe2d8d8808e8b2e330a0ebdd2ac69b5e68a6f2b5eb2. 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/SEAOF0500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3aa0b73c6c6fcd79e5cf9bdaedda1ca21547bf2dea14e4148c20abb25674a4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SEAOF0605050.
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