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 0x0164e8f5c2eb94b01ebfb51947b7808b1485feb9e985e8d4ac313d317bd04eba. 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/ba582d94-b93a-47d9-b5b2-17ad8b735144.json and https://artists.proofprofile.net/proofs/artist/ba582d94-b93a-47d9-b5b2-17ad8b735144.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 0x365fa57676f721b0f004fbc8bb9f12aa13aea70ae2cdfa3b9523157444299cd2. 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/CAN112200736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14011cd9af4619d5cc8d237b50bab4a60c6823cbc0d5de810f64622ec2eda7a0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAN112200737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e8476b294c79e754a1289dc1d5156251a3a8b8e0f9610b58dac1518c56269f. 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/QM4TW2073795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec0454724c5d432e888f5833d4587799cd8ccac3b59e2ae34a5a3f2c8cf7dc. 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/QM6P42020688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d037b078da9d76a1964f1052d132bdfbbf918bedd7e5c21d64ad52d363167ed. 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/QM6P42020691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790ac35403224f23e3fb77797df48915f9f2ac6a049272a2fa237d4d3ebce418. 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/QM4TW2094995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1cd46033c39362d5ad6cc74b2ee8c9e758af2d43f257ad6fc25ac3f1000af2. 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/QM6P42020694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029dc3a089b2c95faea5dca4ab1a2dcae1439ad1cf3a3b4d967ab2cfbcc38252. 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/QM6MZ2086061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b7b55b63a77c8a5f9337df1e2e66a5ecdbc5ecb95fa20dbabbc814b98bdee3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6P42020698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dce2e30cf3cc14bfe1a302ff2df834a11a506032125afafa38e41948e52af2. 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/CAN112200995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19936b7ff658087a58901f63012179f93869157ff8feb722f9f29b444c9c3c6. 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/QZH6S1900309.
I'd Like to Teach the World to Sing (In Perfect Harmony)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f2bed781f5e460b71093892647a60694f2c244843b4d62aabc0160e9c368a. 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/TCAED1921148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9ae2ea95ab9051ba1bef4109fb30ab4beb24ba0e83ae2ff9aa29009c9fbde6. 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/TCAEC1922070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677a88edd7c9d365d8b954da20bd638bc86c1927ebc702c0f500e5626ef5ef80. 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/SE5VF1900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e6e3ca0ecc50b58f317da11c8674ffafd694ccae3f698eb46ca1c2f300ef81. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1839924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f4d3922bd7f6abb4ca793ce804b4a306adcb1d302cc5be95d1cd7d8c34c24. 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/QZ5AB2068132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dfb7750e5acce9f4c922fd932f22f6afa295d74c8170ce1f815f3fec594036. 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/QZ5AB1914183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c83b3b81e140a769b4aeb69f2400a9de11c5721562457a0ca16a6812fe63d3. 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/TCADI1768935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8e599a30dd45b7869ff3fee33c155fe54a83853690235d36c662e70a655208. 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/TCADH1730940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398cfe454e4a48896cc28f59962da044e14db92402194f1d3cf495a8fe9085e3. 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/TCADA1735961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c3c325b319bf205138f407ffcd7675a6e9826610821b41c77ab55c4c2fe471. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCACU1677482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb5c936cb25d7a0c8e183267eab09b99ec689c9ad9b8e22259158239e961b84. 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/TCACJ1573640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9358cf31a4271265482f73923954a3d783115867af1c6e4d7473a379b4fbef53. 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/TCACR1615326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43c0f17c4fd169d83af58bc0dbc5841f579e1e095e5493735a1cb215fc619f. 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/TCACL1669361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0112fbb9496a2a7cc1c5d3c4cae951bb1d6b27cdcde2b0f977c99ce3ad5af8ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACS1604782.