thumb|Prayer hall of the Great Mosque of Kairouan, in Kairouan, Tunisia In architecture, a hall is a relatively large space enclosed by a roof and walls.Oxford English Dictionary In the Iron Age and t
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 0x9a34db31b138d24758029dce33ef3faf8d6b92c4f58b66f0a460dc358bde53bd. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c96e3d9e-60d1-4646-a199-dc70e612e9f6.json and https://artists.proofprofile.net/proofs/artist/c96e3d9e-60d1-4646-a199-dc70e612e9f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Psychedelic Sounds of the 13th Floor Elevators
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 0xa03d1034a8952e746f150e5e343f459adaf80dddee7af94cea0e6f22e8744921. 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/GBAWA0915826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad7be5343d42df11a9a341bd8bdb6fbe40d869e1677284c526cb30d05dfb787. 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/GBAWA0915827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94137ec1cc2e6acaa9b286a898deac3b35dc3fd7d8572a64a3feb4184ac1a5e. 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/GBAWA0915828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35377d0ca6471b06ac84eff985d9a824f4aa3ca29b83cee8a3191eb4b58f6b77. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAWA0915829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0979fbce077b25e9f05a50ad8255afac1d57c8e3f35a875bde29844113d7c6c. 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/GBAWA0915830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7281d8b3ae4c6ee98fc7af3a75f5adf70adf6506292477ab87d6bf609b91db1. 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/GBAWA0915831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec9cdc406869bafd2a0df40ac7fd6cb66e1499fe3d46ff25ba8ab9505f2ab52. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/GBAWA0915835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5dea88897695c0e8af2276cac62251f1db6d9223f44953cc31436705bd2fd4. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:05:51Z), 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/GBAWA0519487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022620ca5e96a01e45b53f5a71c9e533d308e383167d995ca1933296cf290dc5. 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/GBAWA0519485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb35407dde46ae7b52f9adbb9bdbd617af5f872150fefc14f5baa79641982868. 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/GBAWA0519481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7291b20010e440221eb5d91524592c6d7b593b79b4ff4c141a8c502056bfdf0. 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/GBAWA0519495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35e5ab2498e90baa8e78a4c2a0bc762a94490e8988427c12018f745ca03c0f0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAWA0519483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125155e27cf0e0af35f877193d2ddd68f746fb00450b5fff9a9bb626ddeef7ae. 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/GBAWA0921272.
Roller Coaster (Original Stereo Desk Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660c1b3e1801c563b4c66eebb6d2caf2ef18813e9df3e7e8395883329c193992. 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/GBAWA0921274.
Thru the Rhythm (Original Stereo Desk Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76885b9e48ecbe9e32d74a5dbc536ab39ca106392c04cfed7eefb538c32ae4e5. 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/GBAWA0921275.
Tried to Hide (Original Stereo Desk Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aa211cfd5ee829922987502fee18f94b9538f82fbbb38d16946aad612daf2d. 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/GBAWA0921276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f79ab42dedea09c1786f659dd29827f91921d9cbaaf28bf93b1cd5a72e0402. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAWA0519477.
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 0x4f2921273db8741507df62de04adb29c7bbbc20acbd17160fbcded885c6b695f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBAWA0519479.